Patent Publication Number: US-2019194283-A1

Title: Immunomodulatory polypeptides and related compositions and methods

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority from U.S. provisional application No. 62/369,017 filed Jul. 29, 2016, entitled “IMMUNOMODULATORY POLYPEPTIDES AND RELATED COMPOSITIONS AND METHODS,” the contents of which are incorporated by reference in their entirety. 
    
    
     INCORPORATION BY REFERENCE OF SEQUENCE LISTING 
     The present application is being filed with a Sequence Listing in electronic format. The Sequence Listing is provided as a file entitled 735042004240seqlist.txt, created Jul. 27, 2017, which is 139 kilobytes in size. The information in electronic format of the Sequence Listing is incorporated by reference in its entirety. 
     FIELD 
     The present disclosure relates in some aspects to immunomodulatory polypeptides containing a first and second peptide, such as a first and second subunit of a cytokine or a chemokine, connected by a joining region containing a targeting moiety that binds to a target molecule. In some aspects, the disclosure further relates to engineered cells and compositions comprising the immunomodulatory polypeptides and methods for their administration to subjects. In some embodiments, the cells engineered to contain the immunomodulatory polypeptide, such as T cells, further contain a genetically engineered recombinant receptor that specifically binds to antigens, such as a chimeric antigen receptor (CAR). In some embodiments, features of the polypeptides, engineered cells, and methods provide for improved treatment of diseases or conditions, e.g., cancer, such as by reducing adverse effects of cytokine or chemokine therapy or increasing the activity, efficacy and/or persistence of cell therapy. 
     BACKGROUND 
     Various strategies are available for treatment of diseases or conditions such as cancers or tumors, including the administration of cytokines or chemokines. Further, strategies are available for engineering immune cells to express genetically engineered recombinant receptors, such as chimeric antigen receptors (CARs), and administering compositions containing such cells to subjects. Improved strategies are needed to increase efficacy of the treatments, for example, by reducing adverse effects of cytokine or chemokine administration, improving the persistence and/or survival of engineered cells, or reducing the immunogenicity of such therapies upon administration to subjects. Provided are compositions, cells, and methods that meet such needs. 
     SUMMARY 
     Provided herein is an immunomodulatory polypeptide containing a first peptide; a second peptide; and a joining region connecting the first and second peptides, wherein the joining region contains a targeting moiety that binds to a target molecule. In some embodiments, at least one of the first and second peptide is a cytokine or chemokine, a subunit a cytokine or chemokine or is a functional portion of the cytokine or chemokine. 
     In some of any such embodiments, the first peptide is a cytokine or chemokine, a subunit of a cytokine or chemokine, or is a functional portion of the cytokine or chemokine. In some of any such embodiments, the second peptide is a cytokine or chemokine, a subunit of a cytokine or chemokine, or is a functional portion of the cytokine or chemokine. In some of any such embodiments, both the first and second peptide are independently a cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion of the cytokine or chemokine. 
     In some of any such embodiments, the first peptide and the second peptide are the same cytokine or chemokine, or functional portions thereof, or are the same subunit of the same cytokine or chemokine. In some of any such embodiments, the first and second peptide are a different cytokine or chemokine, or functional portions thereof, or are a different subunit of the same or different cytokine or chemokine. In some of any such embodiments, the first peptide is a first subunit of a cytokine or chemokine and the second peptide is a second subunit of the cytokine or chemokine. 
     In some of any such embodiments, the cytokine or chemokine is a monomer. In some of any such embodiments, the first and/or second peptide independently contain(s) a subunit of a cytokine or chemokine that is a multimeric protein. 
     In some of any such embodiments, the first or second peptide is a tag or label. 
     Provided herein is an immunomodulatory polypeptide containing a first peptide containing a first subunit of a cytokine or chemokine or a functional portion thereof; a second peptide containing a second subunit of the cytokine or chemokine or a functional portion thereof; and a joining region connecting the first and second peptides, wherein the joining region contains a targeting moiety that binds to a target molecule. In some of any such embodiments, the cytokine or chemokine is a homodimer or heterodimer. 
     In some of any such embodiments, the joining region further contains at least one polypeptide linker linking the targeting moiety to the first or second peptide. 
     In some of any such embodiments, the cytokine or chemokine or subunit or functional portion thereof is selected from the group consisting of IL-12, IL-15, IL-2, IL-18, GM-CSF, IL-7, IL-21, IFNα, IFNβ, IFNγ, IL-17, IL-23, IL-3, IL-4, IL-5, IL-6, IL-9, IL-11, IL-13, IL-27, Erythropoietin, G-CSF, Growth hormone, Prolactin, Oncostatin M, and Leukemia inhibitory factor or a subunit or functional portion thereof. In some of any such embodiments, the first or second peptide independently contains a subunit of a cytokine or chemokine selected from IL-12, IL-23, IL-27 and IL-35 or a functional portion thereof. 
     In some of any such embodiments, the first or second peptide is independently a subunit of IL-12 or a functional portion thereof. In some embodiments, the first peptide contains an IL-12 p35 subunit or an IL-12 p40 subunit or a functional portion thereof and the second peptide contains the other of the IL-12 p35 subunit and the IL-12 p40 subunit or a functional portion thereof. 
     Provided herein is an immunomodulatory polypeptide containing a first peptide containing a p35 subunit of IL-12 or a functional portion thereof; a second peptide containing a p40 subunit of IL-12 or a functional portion thereof; and a joining region connecting the first and second peptides, wherein the joining region contains a targeting moiety that binds to a target molecule. In some of any such embodiments, the p35 subunit contains the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 95% sequence identity thereto and/or the p40 subunit contains the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 95% sequence identity thereto. 
     In some of any such embodiments, the joining region further contains at least one polypeptide linker linking the targeting moiety to the p35 subunit or the p40 subunit. In some of any such embodiments, the polypeptide linker contains from about 2 to about 20 amino acids. In some of any such embodiments, the polypeptide linker contains the sequence GGGGS(n), wherein n is 1-5 (SEQ ID NO:29). In some of any such embodiments, the polypeptide linker contains the sequence set forth in any of SEQ ID NOs: 7-9. 
     In some of any such embodiments, the joining region contains two polypeptide linkers. In some of any such embodiments, the targeting moiety is contained between a first polypeptide linker and a second polypeptide linker. In some of any such embodiments, the target molecule is associated with a disease or disorder. In some aspects, the disease or disorder is an infectious disease or disorder, an autoimmune disease, an inflammatory disease, or a tumor or a cancer. 
     In some of any such embodiments, the target molecule is associated with a tumor or present on a tumor. In some of any such embodiments, the target molecule is a tumor antigen. In some of any such embodiments, the target molecule is selected from the group consisting of: hepatocyte growth factor (HGF), heparin, VEGF, VEGF-A, VEGFR2, VEGFR3, HER2, PD-1, tenascin-C, CTLA-4, LAGS, PD-L1, EGFR, EPCAM, RANKL, NG2 proteoglycan, CD20, CD52, CD19, CD3, CD30, IL-6, CD38, SLAMF7, GD2, CD13, CD274, CD279, CD40L, and CD47. 
     In some of any such embodiments, the targeting moiety contains from about 3 to about 300 amino acids, about 3 to about 100 amino acids, about 3 to about 20 amino acids, about 6 to about 20 amino acids, or about 10 amino acids. In some of any such embodiments, the targeting moiety exhibits a k off  rate for binding the target molecule that is about 0.5×10 −4  sec −1  or less, about 1×10 −4  sec −1  or less, about 2×10 −4  sec −1  or less, about 3×10 −4  sec −1  or less, about 4×10 −4  sec −1  or less, about 5×10 −4  sec −1  or less, about 1×10 −3  sec −1  or less, about 1.5×10 −3  sec −1  or less, about 2×10 −3  sec −1  or less, about 3×10 −3  sec −1  or less, about 4×10 −3  sec −1  or less, about 5×10 −3  sec −1  or less, about 1×10 −2  sec or less, or about 5×10 −1  sec −1  or less. In some of any such embodiments, the dissociation constant (K D ) of the targeting moiety to the target molecule is at or about or less than at or about 100 nM, 50 nM, 40 nM, 30 nM, 25 nM, 20 nM, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1 nM, such as between at or about 1 nM and at or about 15 nM, e.g., between at or about 5 and at or about 10 nM. 
     In some of any such embodiments, the targeting moiety is or contains an antibody or antibody fragment. In some aspects, the antibody fragment is a single chain fragment. In some embodiments, the antibody fragment is a single domain antibody containing the variable heavy chain region. In some aspects, the antibody fragment contains antibody variable regions joined by a flexible linker. In some of any such embodiments, the antibody fragment contains an scFv. 
     In some of any such embodiments, the targeting moiety contains a variable heavy (VH) chain and/or variable light (VL) chain of an antibody selected from the group consisting of: trastuzumab, pertuzumab, ramucirumab, atezolizumab, bevacizumab, panitumumab, cetuximab, necitumumab, denosumab, nivolumab, pembrolizumab, rituximab, ofatumumab, obinutuzumab, alemtuzumab, blinatumomab, brentuximab vedotin, siltuximab, ipilimumab, daratumumab, elotuzumab, dinutuximab, catumaxomab. In some of any such embodiments, the targeting moiety contains a V H  chain and/or V L  chain of an anti-EPCAM antibody. In some of any such embodiments, the targeting moiety contains the sequence set forth in SEQ ID NO: 17, 24 or 25, or a sequence that has at least 95% sequence identity to SEQ ID NO: 17, 24 or 25 and binds to the target molecule. 
     In some of any such embodiments, the immunomodulatory polypeptide contains the sequence set forth in SEQ ID NO: 6, or a sequence that has at least 95% sequence identity to such a sequence. 
     In some of any such embodiments, the targeting moiety is or contains a peptide binding motif. In some of any such embodiments, the targeting moiety is a heparin binding peptide. In some aspects, the heparin binding peptide (HBP) is derived from fibronectin or BMP4, and/or is of bovine origin. 
     In some of any such embodiments, the targeting moiety is selected from the group consisting of a hepatocyte growth factor (HGF) binding peptide, a VEGF binding peptide, a VEGF-A binding peptide, a VEGFR2 binding peptide, an EPCAM binding peptide, a HER2 binding peptide, a PD-1 binding peptide, a tenascin-C binding peptide, a CTLA-4 binding peptide, a LAGS binding peptide, a PD-L1 binding peptide, a EGFR binding peptide, a RANKL binding peptide, a CD20 binding peptide, a CD52 binding peptide, a CD19 binding peptide, a CD3 binding peptide, a CD30 binding peptide, a IL-6 binding peptide, a CD38 binding peptide, a SLAMF7 binding peptide, a GD2 binding peptide, a CD274 binding peptide, a CD279 binding peptide, a CD40L binding peptide, and a CD47 binding peptide. In some of any such embodiments, the targeting moiety contains a HGF binding peptide or an EGFR binding peptide (EGFRBP). 
     In some of any such embodiments, the targeting moiety contains the sequence set forth in any of SEQ ID NOs: 13, 14, 15, 16, 26, 27 or 28, or a sequence that has at least 95% sequence identity to such a sequence and binds to the target molecule. 
     In some of any such embodiments, the immunomodulatory polypeptide contains the sequence set forth in any of SEQ ID NOs: 1-5, or a sequence that has at least 95% sequence identity to such a sequence. 
     In some of any such embodiments, immunomodulatory polypeptide exhibits increased activity to stimulate via the IL-12R compared to a recombinant IL-12 not containing the joining region. In some of any such embodiments, the immunomodulatory polypeptide exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. In some embodiments, the increased activity and/or binding is/are by greater than 1.2-fold, greater than 1.5-fold, greater than 2.0-fold, greater than 3.0-fold, greater than 4.0-fold, greater than 5.0-fold or greater than 10.0-fold. In some embodiments, the increased activity and/or binding is greater than that exhibited by a reference immunomodulatory polypeptide containing a polypeptide linker between subunits but not containing the targeting moiety. 
     Provided herein is a polynucleotide encoding the immunomodulatory polypeptide according to any one of the embodiments described above. In some aspects, the polynucleotide further contains a signal sequence. In some instances, the signal sequence encodes a signal peptide derived from CD33. In some aspects, the signal peptide contains the sequence set forth in SEQ ID NO: 18, or a sequence that has at least 95% sequence identity to such a sequence. 
     In some of any such embodiments, the polynucleotide further contains at least one promoter that is operatively linked to control expression of the immunomodulatory polypeptide. In some embodiments, the expression of the immunomodulatory polypeptide is inducible or conditional. In some of any such embodiments, the polynucleotide further contains a conditional promoter, enhancer, or transactivator. In some aspects, the conditional promoter, enhancer, or transactivator is an inducible promoter, enhancer, or transactivator or a repressible promoter, enhancer, or transactivator. 
     In some embodiments, the promoter, enhancer or transactivator is a T cell activation factor. For example, the promoter, enhancer or transactivator contains a binding site for one or more T cell transcription factor(s). In some embodiments, the promoter, enhancer or transactivator contains a binding site for nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, and/or NFκB. 
     In some embodiments, activation of the promoter, enhancer, or transactivator is a conditional, optionally an inducible promoter, enhancer, or transactivator or a repressible promoter, enhance or transactivator. 
     In some embodiments, the promoter, enhancer or transactivator is active in the presence of one or more conditions present in the tumor microenvironment. The one or more conditions present in the tumor microenvironment can be selected from hypoxia, low glucose, acidic pH and/or oxidative stress. 
     In some embodiments, the one or more conditions present in the tumor microenvironment is hypoxia. In some of such embodiments, the polynucleotide is operatively linked to a promoter, and the promoter is a HIF-1-alpha-responsive promoter. In some embodiments the polynucleotide is operatively linked to a promoter, and the promoter contains one or more hypoxia response element(s). An exemplary hypoxia response element contains the sequence 5′-(A/G)CGT(G/C)(G/C)-3′. In such embodiments, the promoter can be an erythropoietin (Epo), VEGF-A, phosphoglycerate kinase 1 (PGK1), lactate dehydrogenase A (LDH A), aldolase A (ALDA) or glyceraldehyde 3-phosphate dehydrogenase (GAPDH) promoter. The promoter can have the sequence set forth in any of SEQ ID NOs: 85-90. 
     In some embodiments, the one or more conditions present in the tumor microenvironment is low glucose. In some of such embodiments, the polynucleotide is operatively linked to a promoter that is a GRP78 or hexokinase II promoter. 
     In some embodiments, the promoter, enhancer, or transactivator is inducible by radiation, heat or in the presence of a drug. 
     In some embodiments, the promoter is a radiation-inducible promoter. Exemplary radiation-inducible promoters can contain a CArG element or a CC(A+T rich) 6 GG motif. In some embodiments, the radiation-inducible promoter is an EGR-1, Waf-1, RecA, or cIAP2 promoter or is a synthetic promoter, such as a promoter with a sequence set forth in SEQ ID NOs 92-95. 
     In some embodiments, the promoter, enhancer or transactivator is a heat-inducible promoter, enhancer or transactivator. In some of such embodiments, the heat-inducible promoter, enhancer, or transactivator contains a heat shock element (HSE). In some embodiments, the heat-inducible promoter, enhancer, or transactivator is a heat shock promoter (HSP), such as an HSP70B promoter or a Gadd 153 promoter. 
     In some embodiments the promoter, enhancer, or transactivator is a drug-inducible promoter, enhancer, or transactivator. In some instances, the inducible promoter, enhancer, or transactivator contains a Lac operator sequence, a tetracycline operator sequence, a galactose operator sequence, a doxycycline operator sequence, a rapamycin operator sequence, a tamoxifen operator sequence, or a hormone-responsive operator sequence, or an analog thereof. In some embodiments, the inducible promoter contains a tetracycline response element (TRE). In some embodiments, the drug-inducible promoter, enhancer, or transactivator contains a multidrug resistance (mdr1) gene promoter. 
     In some of any such embodiments, the polynucleotide contains a single nucleic acid sequence. In some of any such embodiments, the polynucleotide contains a first nucleic acid sequence encoding the immunomodulatory polypeptide and a second nucleic acid sequence encoding a recombinant receptor. In some aspects, the recombinant receptor is or contains a chimeric antigen receptor (CAR). In some embodiments, the polynucleotide further contains at least one promoter that is operatively linked to control expression of the immunomodulatory polypeptide and/or the recombinant receptor. 
     In some of any such embodiments, the polynucleotide further contains an internal ribosome entry site (IRES) between the first and second nucleic acid sequences to yield translation products of the first and second nucleic acid sequences after translation. In some embodiments, the polynucleotide contains a nucleic acid sequence encoding a linking peptide between the first and second nucleic acid sequences, wherein the linking peptide separates the translation products of the first and second nucleic acid sequences during or after translation. In some aspects, the linking peptide contains a self-cleaving peptide, or a peptide that causes ribosome skipping, optionally a T2A peptide. 
     Any of the embodied polynucleotides can be optimized to remove CpG motifs and/or codon-optimized. In some embodiments, the polynucleotide is human codon-optimized. 
     Provided herein is a vector containing the polynucleotide according to any one of the embodiments described above. In some embodiments, the vector is a viral vector. In some aspects, the vector is a retroviral vector. In some instances, the vector is a lentiviral vector or a gammaretroviral vector. 
     Provided herein is an engineered cell containing the immunomodulatory polypeptide according to any one of the embodiments described above. In some of any such embodiments, provided is an engineered cell containing the polynucleotide according to any one of the embodiments described above. In some embodiments, the engineered cell contains the vector according to any one of the embodiments described above. 
     In some of any such embodiments, the engineered cell secretes the immunomodulatory polypeptide. In some embodiments, the engineered cell further contains a recombinant receptor. In some instances, the recombinant receptor binds to a target antigen that is associated with a disease or disorder. In some aspects, the disease or disorder is an infectious disease or disorder, an autoimmune disease, an inflammatory disease, or a tumor or a cancer. In some embodiments, the target antigen is a tumor antigen. 
     In some of any such embodiments, the target antigen is selected from the group consisting of ROR1, Her2, L1-CAM, CD19, CD20, CD22, mesothelin, CEA, hepatitis B surface antigen, anti-folate receptor, CD23, CD24, CD30, CD33, CD38, CD44, EGFR, EGP-2, EGP-4, EPHa2, ErbB2, ErbB3, ErbB4, FBP, fetal acetylcholine e receptor, GD2, GD3, HMW-MAA, IL-22R-alpha, IL-13R-alpha2, kdr, kappa light chain, Lewis Y, L1-cell adhesion molecule, MAGE-A1, mesothelin, MUC1, MUC16, PSCA, NKG2D Ligands, NY-ESO-1, MART-1, gp100, oncofetal antigen, TAG72, VEGF-R2, carcinoembryonic antigen (CEA), prostate specific antigen, PSMA, estrogen receptor, progesterone receptor, ephrinB2, CD123, CS-1, c-Met, GD-2, MAGE A3, CE7, Wilms Tumor 1 (WT-1), and cyclin A1 (CCNA1). In some embodiments, the targeting moiety is human or is derived from a human protein. 
     In some of any such embodiments, the immunomodulatory protein is not immunogenic and/or does not induce an immune response in a subject in which it is administered. 
     In some of any such embodiments, the recombinant receptor is a functional non-TCR antigen receptor or a transgenic TCR. In some embodiments, the recombinant receptor is a chimeric antigen receptor (CAR). In some of any such embodiments, the recombinant receptor contains an extracellular portion containing an antigen-binding domain. In some instances, the antigen-binding domain is or contains an antibody or an antibody fragment. In some aspects, the antibody fragment is a single chain fragment. In some embodiments, the fragment contains antibody variable regions joined by a flexible linker. In some of any such embodiments, the fragment contains an scFv. 
     In some of any such embodiments, the recombinant receptor contains an intracellular signaling region. In some aspects, the intracellular signaling region is capable of inducing a primary activation signal in a T cell, is a T cell receptor (TCR) component, and/or contains an immunoreceptor tyrosine-based activation motif (ITAM). In some instances, the intracellular signaling region is or contains an intracellular signaling domain of a CD3-zeta (CD3) chain or a signaling portion thereof. 
     In some of any such embodiments, the engineered cell further contains a transmembrane domain linking the extracellular portion and the intracellular signaling region. In some embodiments the intracellular region contains an intracellular signaling domain. In some of any such embodiments, the recombinant receptor further contains a costimulatory signaling domain. In some instances, the costimulatory signaling domain contains an intracellular signaling domain of a T cell costimulatory molecule or a signaling portion thereof. In some aspects, the costimulatory signaling domain contains an intracellular signaling domain of CD28, 4-1BB or ICOS or a signaling portion thereof. In some embodiments, the costimulatory signaling domain is between the transmembrane domain and the intracellular signaling region. 
     In some of any such embodiments, the engineered cell is a T cell. In some of any such embodiments, the engineered cell is a CD8+ T cell or a CD4+ T cell. 
     In some of any such embodiments, the engineered cell exhibits increased persistence and/or survival compared to cells not engineered or compared to cells containing a recombinant receptor but not the immunomodulatory polypeptide. In some of any such embodiments, the engineered cell exhibits increased activity to stimulate via the IL-12R compared to a recombinant IL-12 not containing the joining region. In some embodiments, the reference IL-12 does not contain a joining region or contains a joining region that consists of any of the sequences set forth in SEQ ID NOs 7-9. 
     In some of any such embodiments, the engineered cell secretes an immunomodulatory polypeptide that exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. In some of any such embodiments, the engineered cell effects increased killing of a target cell expressing the target molecule compared to killing of cells not expressing the target molecule. In some of any such embodiments, the increased persistence, activity, binding, and/or killing is greater than effected by a reference engineered cell expressing or secreting an immunomodulatory polypeptide containing a polypeptide linker between subunits but not containing the targeting moiety. 
     Provided herein is a composition containing the immunomodulatory polypeptide according to any one of the embodiments described above. Provided herein is a composition containing the engineered cell according to any one of the embodiments described above. In some embodiments, the composition further contains a pharmaceutically acceptable excipient. 
     Provided herein is a method of treatment including administering the immunomodulatory polypeptide according to any one of the embodiments described above, the engineered cell according to any one of the embodiments described above, or the composition of according to any one of the embodiments described above, to a subject having a disease or disorder. In some instances, the immunomodulatory polypeptide specifically binds to a target molecule expressed by a cell associated with the disease or disorder. In some aspects, the engineered cell expresses a recombinant receptor that specifically binds to an antigen associated with the disease or condition. In some embodiments, the disease or disorder is a cancer, a tumor, an autoimmune disease or disorder, or an infectious disease. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  depicts interferon gamma (IFN-γ) secretion in PHA blasts following stimulation with recombinant human IL-12 (rHuIL-12), a scIL-12 or immunomodulatory polypeptides containing either a HBP targeting moiety (IL-12 HBP) or an EGFR targeting moiety (IL-12 EGFR). 
         FIG. 2  depicts the fold change in total number of cells following stimulation of cells with the tested IL-12 immunomodulatory protein at various effector target cell ratios. 
         FIG. 3  depicts the killing index of cells following stimulation of cells with the tested IL-12 immunomodulatory protein at various effector target cell ratios. 
         FIG. 4  depicts the binding affinities of IL-12 immunomodulatory proteins as assessed by surface plasmon resonance. 
     
    
    
     DETAILED DESCRIPTION 
     Provided herein are immunomodulatory polypeptides, including those containing a first and second peptide connected by a joining region containing a targeting moiety that binds to a target molecule. In some embodiments, the first and second peptides are independently a first and second cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion of a cytokine or chemokine. In some embodiments, the immunomodulatory protein contains a first subunit and second subunit of a cytokine or chemokine connected by a joining region containing a targeting moiety that binds to a target molecule. In some embodiments, the cytokine is IL-12 and the immunomodulatory polypeptide contains a p35 and p40 subunit of IL-12 linked by a joining region containing a targeting moiety that binds to a target molecule. In some embodiments, the target molecule is a molecule overexpressed in or specific to a diseased environment, such as a tumor microenvironment, such as on a cell present in a diseased or tumor microenvironment. Also provided are compositions and engineered cells containing the immunomodulatory polypeptides and methods of administering such compositions and cells. 
     Administration of various peptides, such as cytokines and chemokines, can be effective in treating diseases and conditions, such as cancer. However, certain such treatments, such as those involving systemic administration of natural or unmodified cytokines, can be associated with unwanted effects, such as those arising from activity of the molecules at sites other than cells or tissues of the disease or condition, e.g., tumor cells. As such, current methods may be not entirely satisfactory, and improved efficacy and safety are desired. 
     In some embodiments, the immunomodulatory polypeptides provided herein specifically bind to a target molecule expressed by a cell associated with the disease or condition. Thus, in some cases, the immunomodulatory polypeptide is targeted to tissues and cells that express known target molecules, e.g., tumor cells. In some cases, targeting of the immunomodulatory polypeptide to cells containing the target molecule is associated with less unwanted, or more desired, outcomes as compared to treatment with the peptides, such as cytokines or chemokines, e.g., recombinant human cytokines or chemokines, not containing a linker or targeting moiety. 
     In some aspects, the provided embodiments exhibit comparable safety, and improved efficacy, as compared to a reference treatment regime or composition, such as compared to cell-based or local delivery-based administration of the cytokine or a related or unmodified version thereof, generally designed for tumor-localization of the cytokine. In some respects, the provided embodiments include systemic administration, with increased safety profile as compared to systemic administration of native or unmodified version of the cytokine molecule. 
     In some aspects, the cytokine is interleukin 12 (IL-12). IL-12 is typically a mediator of innate and cellular immunity. In some contexts, IL-12 effects anti-tumor and anti-metastatic activity. Generally, IL-12 acts on T cells and NK cells. Functions of IL-12 include the priming of the T helper 1 (Th1) immune responses and IFN-γ secretion by NK cells. Typically, IL-12 generates the Th1 response by promoting the differentiation of naïve T cells, during initial encounter with an antigen, into a population of Th1-cells capable of producing large amounts of IFN-γ following activation. In some contexts, IL-12 serves as a co-stimulus for maximum secretion of IFN-γ by differentiated Th1 cells responding to a specific antigen. IL-12, in some contexts, stimulates the development of IFN-γ producing Th1 cells from populations of resting memory T cells interacting with an antigen to which they have been previously exposed. Thus, in some aspects, IL-12 can promote or mediate immune effector functions to enhance anti-tumor immune responses, including in connection with administration of cells in adoptive cell therapy. 
     In some cases, as with many other cytokines, however, certain studies involving the systemic administration of recombinant human native IL-12 has been observed to be associated with toxicity, such as systemic toxicity. In some cases, clinical trials in patients with cancer have revealed promising therapeutic activities, but have typically also shown that systemically administered native recombinant human IL-12 can have side effects (Lasek et al. (2014) Cancer Immunol. Immunother., 63:419-435). In some aspects, such certain types of administration of such recombinant IL-12 can result in grade 3 or grade 4 toxicity as assessed in accord with National Cancer Institute Groups Toxicity Criteria Scale (Creekmore et al. (eds): Biologic Therapy of Cancer. Philadelphia, Pa., Lippincott, 1991, p. 76). In some cases, clinical symptoms of toxicity can include, for example, one or more of fatigue, dyspnea, stomatitis, acidosis or gastrointestinal hemorrhage. In some cases, laboratory adverse events can include one or more of leukopenia, neutropenia, hyperbilirubinemia, elevated AST, elevated ALT, thrombocytopenia, elevated creatinine or elevated alkaline phosphatase. Assays to assess and determine the presence or absence of potentially adverse effects are known (see e.g. Leonard et al. (1997) Blood, 90:2541-2548). Various other delivery routes and modified constructs, however, such as local, e.g., tumor site administration of IL-12 and/or introduction of cells such as T cells that naturally secrete or are engineered to secrete IL-12, e.g., in a tumor-targeted manner, have been observed to be safe and associated with fewer or no toxic outcomes or risk thereof. In some examples, engineered T cells, such as those expressing chimeric antigen receptors, also expressing recombinant or exogenous IL-12, e.g., a single-chain heterodimeric format, that is secreted, have been reported with encouraging results (Pegram et al. (2012) Blood, 119:4133-4141). 
     In some embodiments, the provided immunomodulatory polypeptides, such as IL-12 immunomodulatory polypeptides, when administered, may result in reduced toxicity, such as reduced systemic toxicity, as compared with other treatments such as other types of therapy involving the administration, such as systemic administration, of recombinant human IL-12. In some embodiments, the provided cells expressing such immunomodulatory polypeptides, when administered to a patient, may result in reduced toxicity, such as reduced systemic toxicity, as compared with other treatments, such as other types of therapy involving administration of cells expressing recombinant human IL-12. In some embodiments, the toxicity resulting from the provided cells is reduced, or further reduced, by modifying the polynucleotide that yields the recombinant or exogenous IL-12, such that the expression is inducible or condition-dependent, such as by incorporation of one or more inducible or condition-dependent promoter and/or regulatory elements as described herein below. For example, the polynucleotide can be modified to employ one or more inducible promoters such that IL-12 expression is effected upon administration of an exogenous agent, such as radiation, heat, or a drug or small molecule, and is otherwise not expressed. In other examples, expression of the recombinant or exogenous IL-12 can be restricted such that expression only occurs in particular microenvironments, such as tumor microenvironments (e.g., hypoxic conditions). Regulation of IL-12 expression such that the recombinant IL-12 is expressed only in targeted regions of the body and/or only under particular conditions can mitigate the toxicity of administering IL-12-expressing cells. 
     In some embodiments, subjects, when administered with a provided immunomodulatory polypeptide containing a targeting moiety or cells expressing or secreting such immunomodulatory polypeptide, such as a provided IL-12 immunomodulatory polypeptide containing a targeting moiety, do not or do not, on average of the subjects administered, exhibit severe toxicity or an IL-12 associated toxicity that is grade 3 or higher. In some aspects, compared to other methods, the subjects exhibit the same or reduced toxicity or lack thereof and increased efficacy, such as an increase in the immunomodulatory effects of the IL-12 as provided herein. 
     In some cases, the structure of the immunomodulatory polypeptide is such that when the targeting moiety binds the target molecule, e.g., on the surface of a target cell, the first and second peptides (e.g. subunits of the cytokine or chemokine) are oriented away from the target cell. In some such cases, the subunits of the cytokine or chemokine are oriented towards an adjacent non-target cell, such as an immune cell. In some embodiments, such an orientation may discourage the cytokine or chemokine from binding to its receptor on the target cells. In some aspects, such an orientation may promote binding of the cytokine or chemokine to its receptor on immune cells, e.g., T cells. In some instances, such an orientation may effect enhanced T cell stimulation as compared with other immunomodulatory polypeptides not designed to be oriented away from the target cell or designed to be oriented toward the target cell. In some cases, the structure, e.g., order and size of components, of the joining region is designed to promote binding of the targeting moiety to a target cell while promoting binding of the first and second peptides, e.g. first and second cytokines or subunits of cytokines, toward an adjacent non-target cell, e.g. such that the subunits are oriented away from the target cell. 
     In some aspects, the targeting moiety is connected to one or both of peptides, such as one or both of the subunits. In some embodiments, the targeting moiety is configured between the first and second peptide, such as the first and second subunit of a cytokine or chemokine (e.g. IL-12). In some embodiments, the targeting moiety is connected directly or indirectly, such as via one or more linker(s). In some instances, the joining region further contains at least one polypeptide linker linking the targeting moiety to the first or second peptides, such as first or second subunit of a cytokine or chemokine. In some cases, the joining region contains two or more polypeptide linkers. For example, in some aspects, the first peptide (e.g. first subunit) is attached to a first polypeptide linker, the first polypeptide linker is attached to a first end of the targeting moiety, and a second polypeptide linker is attached to the second end of the targeting moiety and the second peptide (e.g. second subunit). Thus, in some contexts, the targeting moiety is flanked between two or more polypeptide linkers that attach it to one or both of the peptides (e.g. subunits of a cytokine or chemokine). In some embodiments, such an order of the components of the joining region promotes the orientation of the peptides (e.g., cytokine or chemokine subunits) away from the target cell. 
     In some aspects, the size, e.g., length, of the joining region is such that the first and second peptides (e.g., cytokine or chemokine subunits) will be oriented in the desired orientation. In some embodiments, the joining region is no more than 400, 300, 250, 200, 150, 100, 50, 40, 30, 25, 20, 15, 10, or 5 amino acids. In some aspects, the length of the joining region is between or between about 200 and 400 amino acids, between or between about 100 and 200 amino acids, or between or between about 5 and 50 amino acids, such as between or between about 10 and 50 amino acids, 10 and 40 amino acids, 10 and 30 amino acids, 10 and 20 amino acids, 20 and 50 amino acids, 20 and 40 amino acids, 20 and 30 amino acids, 30 and 50 amino acids or 30 and 40 amino acids. 
     In some embodiments, the nucleic acid molecule encoding the immunomodulatory polypeptide is operably linked to a promoter, such as an inducible, conditional, or activation-induced promoter or enhancer. In some embodiments, the promoter or enhancer controls expression of the immunomodulatory polypeptide. Thus, in some contexts, the immunomodulatory polypeptide is expressed essentially only when the promoter or enhancer is active. For example, in some cases, a conditional promoter may be activated by co-administration of a molecule or compound or may be downregulated following co-administration with a molecule or compound. 
     In some aspects, the expression of the immunomodulatory polypeptide is effected in the presence of immune cell, e.g., T cell, activation, such as by a T cell activation factor. For example, in some instances, the promoter, enhancer or other response element or portion thereof is recognized by a transcription factor to drive expression of a gene whose activity is normally turned on by T cell activation. In some embodiments, the T cell activation factor can be a regulatory domain or region (e.g. promoter, enhancer or other response element) of a transcription factor whose activity is turned on by T cell activation. In some embodiments, the T cell activation factor is responsive to one or more of T cell activation, signal strength of TCR signaling and/or quality of TCR signaling. 
     In some embodiments, the T cell activation factor can be a regulatory element, such as a promoter, enhancer or response element or elements, that contains a binding site for a T cell transcription factor, and that thereby is associated with the downstream activity of a T cell transcription factor. In some embodiments, the transcription factor is nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, or NFκB. For example, in some embodiments, the T cell activation factor contains a response element or elements recognized by a nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, and NFκB. In some embodiments, the T cell activation factor can contain a regulatory element or elements recognized by or responsive to one or two, and in some cases three or more, unique transcription factors. 
     In some aspects, where the expression of the immunomodulatory polypeptide is controlled by such a conditional, inducible, or activation-induced promoter or enhancer, the efficacy of the immunomodulatory polypeptide is improved as compared to a recombinant human cytokine or chemokine or to an immunomodulatory polypeptide not operably linked to such a promoter or enhancer. In some aspects, the risk of potential side effects or outcomes indicative of toxicity, of the immunomodulatory polypeptide operably linked to such a promoter or enhancer is reduced as compared with a recombinant human cytokine or chemokine or to an immunomodulatory polypeptide not operably linked to such a promoter or enhancer. In some aspects, efficacy is increased comparatively. For example, in some cases, provided immunomodulatory polypeptides whose expression is inducibily or conditionally controlled may have decreased or no expression in non-target tissues, but can be activated in the vicinity of target tissues. In some embodiments, the nucleic acid molecules encoding the provided immunomodulatory polypeptides operably linked to an activation-induced promoter may have decreased or no expression in non-target tissues, but can be activated in the vicinity of target tissues where an immune response has been elicited. Such approaches may result in reduced potential for unwanted outcomes or increased efficacy as compared with other compositions and methods. 
     In some embodiments, the immunomodulatory polypeptide exhibits activity to stimulate a receptor recognized by the first or second peptide, e.g. a cytokine or chemokine receptor. In some embodiments, the activity of the immunomodulatory polypeptide to stimulate the receptor is increased as compared to an immunomodulatory protein not containing the targeting moiety, such as a recombinant cytokine or chemokine not comprising the joining region. In some aspects, the immunomodulatory polypeptide exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. In some aspects, the increased activity and/or binding is greater than effected by a reference immunomodulatory polypeptide containing a polypeptide linker between subunits but not containing the targeting moiety. In any of such aspects, the increase is by greater than 1.2-fold, greater than 1.5-fold, greater than 2.0-fold, greater than 3.0-fold, greater than 4.0-fold, greater than 5.0-fold or greater than 10.0-fold. 
     In some embodiments, the immunomodulatory protein is not immunogenic. In some cases, the immunomodulatory polypeptide does not induce an immune response in a subject to which it is administered. In some cases, the immunomodulatory polypeptide is less immunogenic than polypeptide molecules, e.g. cytokines or chemokines, linked to larger targeting moiety and/or connected via larger joining regions. In some embodiments, a subject that is administered the immunomodulatory protein or a cell expressing the immunomodulatory protein does not exhibit or exhibits a reduced immune response or a particular type or degree of immune response, against the immunomodulatory protein compared to administration of such other alternative molecules or administration of cells expressing such other alternative molecules, respectively. The type of immune response that is reduced may be a detectable immune response, a humoral immune response, and/or a cell-mediated immune response. 
     In some embodiments, the immunomodulatory polypeptide is provided on or in combination with cells encoding a recombinant receptor, such as a chimeric antigen receptor (CAR), that combines a ligand-binding domain (e.g. antibody or antibody fragment) that provides specificity for a desired antigen (e.g., tumor antigen) with an activating intracellular domain portion, such as a T cell activating domain, providing a primary activation signal. In some embodiments, the provided immunomodulatory polypeptides and recombinant receptors, when genetically engineered into immune cells can modulate T cell stimulation and/or activation, thereby resulting in genetically engineered cells with improved longevity, survival and/or persistence in vivo, such as for use in adoptive cell therapy methods. 
     Thus, also provided are cells, such as cells that contain the immunomodulatory polypeptide and/or an engineered recombinant receptor, such as described herein. In some embodiments, the cells are capable of secreting or are designed to secrete the immunomodulatory peptide, such as the cytokine, such as the modified IL-12 polypeptide. Methods for engineering cells to secrete polypeptides are described, for example, in Pegram et al. (2012) Blood, 119:4133-4141; U.S. publ. No. US20160045551 and U.S. publ. No. US20100178276. 
     In some embodiments, the engineered cell secretes the immunomodulatory polypeptide that exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule, and/or exhibits increased binding to the target cell and/or increased efficacy as compared to a cell expressing a cytokine, e.g., IL-12, that is otherwise the same or substantially the same or similar to the immunomodulatory polypeptide, but that does not contain modifications, is not a single-chain molecule, does not include a linker, is not a heterodimeric single chain molecule, and/or does not have the targeting moiety. In some aspects, the engineered cell effects increased killing of a target cell expressing the target molecule compared to killing of cells not expressing the target molecule. 
     In some cases, the immunomodulatory polypeptides and recombinant receptors can be expressed in cells to produce genetically engineered T cells that, when administered to a subject, exhibit one or more properties that are improved compared to a reference cell composition that does not express or secrete the immunomodulatory protein. In some instances, the increased persistence, activity, binding, and/or killing is greater than effected by a reference composition comprising an engineered cell not expressing an immunomodulatory polypeptide or expressing or secreting an immunomodulatory polypeptide comprising a polypeptide linker between subunits but not comprising the targeting moiety. Thus, in some cases, one or more properties of administered genetically engineered cells that can be improved or increased or greater compared to administered cells of a reference composition include decreased immunogenicity, increased activation, and increased survival and/or persistence. 
     In some embodiments, engineered cells containing the immunomodulatory polypeptide and a recombinant receptor exhibit increased persistence and/or survival compared to cells not engineered or compared to cells comprising a recombinant receptor but not the immunomodulatory polypeptide. In some embodiments, a genetically engineered cell with increased persistence exhibits better potency in a subject to which it is administered. In some aspects, the persistence of administered cells is increased at least or about at least 1.5-fold, 2-fold, 3-fold, 4-fold, 5-fold, 6-fold, 7-fold, 8-fold, 9-fold, 10-fold, 20-fold, 30-fold, 50-fold, 60-fold, 70-fold, 80-fold, 90-fold, 100-fold or more. 
     In some embodiments, the degree or extent of persistence of administered cells can be detected or quantified after administration to a subject. For example, in some aspects, quantitative PCR (qPCR) is used to assess the quantity of cells expressing the recombinant receptor (e.g., CAR-expressing cells) in the blood or serum or organ or tissue (e.g., disease site) of the subject. In some aspects, persistence is quantified as copies of DNA or plasmid encoding the receptor, e.g., CAR, per microgram of DNA, or as the number of receptor-expressing, e.g., CAR-expressing, cells per microliter of the sample, e.g., of blood or serum, or per total number of peripheral blood mononuclear cells (PBMCs) or white blood cells or T cells per microliter of the sample. In some embodiments, flow cytometric assays detecting cells expressing the receptor generally using antibodies specific for the receptors also can be performed. Cell-based assays may also be used to detect the number or percentage of functional cells, such as cells capable of binding to and/or neutralizing and/or inducing responses, e.g., cytotoxic responses, against cells of the disease or condition or expressing the antigen recognized by the receptor. In any of such embodiments, the extent or level of expression of another marker associated with the recombinant receptor (e.g. CAR-expressing cells) can be used to distinguish the administered cells from endogenous cells in a subject. 
     Also provided are methods and uses of the immunomodulatory polypeptides and engineered cells containing or secreting the immunomodulatory polypeptides, such as for use in adoptive therapy in the treatment of cancers. Further provided are methods for engineering, preparing, and producing the immunomodulatory polypeptides and cells, compositions containing the immunomodulatory polypeptides and cells, and kits and devices containing and for using, producing and administering the compositions or cells. Also provided are methods, compounds, and compositions for producing the engineered cells. Provided are nucleic acids, such as constructs, e.g., viral vectors encoding the immunomodulatory polypeptides and/or genetically engineered recombinant receptors, and methods for introducing such nucleic acids into the cells, such as by transduction. Also provided are compositions containing the immunomodulatory polypeptides and engineered cells, and methods, kits, and devices for administering the cells and compositions to subjects, such as for adoptive cell therapy. In some aspects, the cells are isolated from a subject, engineered, and administered to the same subject. In other aspects, they are isolated from one subject, engineered, and administered to another subject. 
     I. IMMUNOMODULATORY POLYPEPTIDES 
     Provided in some embodiments are immunomodulatory polypeptides, such as those containing a first peptide, a second peptide and a joining region connecting the first and second peptides. In some embodiments, the first and second peptide can be or are derived from a cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion of a cytokine or chemokine thereof. In some embodiments, the first peptide is a first subunit of a cytokine or chemokine or a functional portion thereof and the second peptide is a second subunit of the cytokine or chemokine or a functional portion thereof, which are joined by a joining region connecting the first and second subunits. In some embodiments, the term “functional portion” may mean a sufficient portion of a cytokine or chemokine or a subunit of a cytokine or chemokine that is capable of binding to its cognate receptor to transduce their signal, and effect immunomodulation activity. A functional portion typically contains at least or about at least 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95% or more of the full length sequence, such as the full length mature sequence lacking the signal peptide. In some embodiments, the provided immunomodulatory polypeptides or cells containing such a peptide exhibit increased or decreased activity to stimulate or suppress the activity or response of a cognate receptor, compared to a reference polypeptide, wherein the reference polypeptide is the polypeptide, such as a recombinant protein, not containing the joining region or the reference polypeptide is a recombinant protein containing the joining region, but not containing a targeting moiety. In some embodiments, the immunomodulatory polypeptide exhibits increased affinity for one or more cognate receptor and exhibits increased activity to stimulate via the one or more cognate receptor, compared to the reference polypeptide. In other embodiments, the immunomodulatory polypeptide exhibits decreased affinity for one or more cognate receptor and exhibits decreased stimulation via the one or more cognate receptor, compared to the reference polypeptide. In some embodiments, the immunomodulatory receptor modulates activity by exhibiting increased or decreased binding affinity for the cognate receptor, compared to the reference polypeptide. 
     In some embodiments, the immunomodulatory polypeptide exhibits a binding affinity for the target molecule with a K D  (i.e., an equilibrium dissociation constant of a particular binding interaction with units of M; equal to the ratio of the off-rate [k off  or k d ] to the on-rate [k on  or k a ] for this association reaction, assuming bimolecular interaction) of equal to or less than 10 −5  M. For example, the equilibrium dissociation constant K D  ranges from or from about 10 −5  M to or to about 10 −15  M, such as from or from about 10 −6  M to or to about 10 −12  M, from or from about 10 −7  M to or to about 10 −11  M, from or from about 10 −6  M to or to about 10 −8  M, or from or from about 10 −7  M to or to about 10 −8  M. In some embodiments, the K D  of the targeting moiety to the target molecule is at or about or less than at or about 100 nM, 50 nM, 40 nM, 30 nM, 25 nM, 20 nM, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.5, or 0.1 nM, such as between at or about 0.1 nM and at or about 15 nM, e.g., between at or about 1 and at or about 10 nM. In some embodiments, the K D  of the targeting moiety to the target molecule is at or about or less than at or about 1 nM, 100 picomolar (pM), 90 pM, 80 pM, 70 pM, 60 pM, 50 pM, 40 pM, 30 pM, 25 pM, 20 pM, 15 pM, 10 pM, or 1 pM, such as between at or about 10 pM and at or about 100 pM, e.g., between at or about 25 pM and at or about 75 pM. 
     In some aspects, the increased activity and/or binding is greater or less than the activity and/or binding effected by a reference immunomodulatory polypeptide containing a polypeptide linker between subunits but not containing a targeting moiety. In some such aspects, the increase is by greater than 1.2-fold, greater than 1.5-fold, greater than 2.0-fold, greater than 3.0-fold, greater than 4.0-fold, greater than 5.0-fold or greater than 10.0-fold. 
     In some embodiments, the immunomodulatory polypeptide specifically or preferentially binds to a target molecule expressed by a cell associated with the disease or disorder. In some cases, the joining region contains a targeting moiety that binds to a target molecule. In some instances, the joining region further contains at least one polypeptide linker linking the targeting moiety to the first or second subunit. 
     A. Cytokines/Chemokines 
     In some embodiments, the cytokine or chemokine or a subunit or functional portion thereof is a cytokine or chemokine that binds to a receptor on an immune cell, such as a T cell, NK cell, macrophage, dendritic cell or other immune cell. In some embodiments, the immune cell is a T cell, such as a CD4+ or CD8+ T cell. 
     In some embodiments, the first or second cytokine or chemokine or a first or second subunit of a cytokine or chemokine or a functional portion thereof is independently selected from IL-12, IL-15, IL-2, IL-18, GM-CSF, IL-7, IL-21, IFNα, IFNβ, IFNγ, IL-17, IL-23, IL-3, IL-4, IL-5, IL-6, IL-9, IL-11, IL-13, IL-27, Erythropoietin, G-CSF, Growth hormone, prolactin, oncostatin M, leukemia inhibitory factor, IL-22, and IL-10, or a subunit or functional portion thereof. In some embodiments, it is mammalian, such as is human. Non-limiting examples of exemplary cytokines and chemokines of a provided immunomodulatory protein are set forth in Table 1. In some embodiments, the first and second peptide, such as a first and second cytokine or chemokine, subunit of a cytokine or chemokine or functional portion thereof, does not contain a signal peptide or propeptide. 
     In some embodiments, the first or second peptide, such as a first or second cytokine or chemokine, subunit of a cytokine or chemokine or functional portion thereof independently contains a sequence of amino acids set forth in any of SEQ ID NOs:10, 11 and 30-69 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to any of SEQ ID NOs:10, 11 and 30-69. 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 Exemplary cytokine and chemokine sequences 
               
            
           
           
               
               
               
               
            
               
                   
                   
                 UniProt 
                 SEQ ID 
               
               
                 Name 
                 Sequence 
                 ID 
                 NO. 
               
               
                   
               
               
                 IL-12 alpha 
                 RNLPVATPDPGMFPCLHHSQNLLRAVSNMLQKARQ 
                 P29459 
                 10 
               
               
                 (p35), IL-35 
                 TLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTK 
                   
                   
               
               
                 alpha 
                 NESCLNSRETSFITNGSCLASRKTSFMMALCLSSI 
                   
                   
               
               
                   
                 YEDLKMYQVEFKTMNAKLLMDPKRQIFLDQNMLAV 
                   
                   
               
               
                   
                 IDELMQALNFNSETVPQKSSLEEPDFYKTKIKLCI 
                   
                   
               
               
                   
                 LLHAFRIRAVTIDRVMSYLNAS 
                   
                   
               
               
                   
               
               
                 IL-12 beta 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDG 
                 P29460 
                 11 
               
               
                 (p40) 
                 ITWTLDQSSEVLGSGKTLTIQVKEFGDAGQYTCHK 
                   
                   
               
               
                   
                 GGEVLSHSLLLLHKKEDGIWSTDILKDQKEPKNKT 
                   
                   
               
               
                   
                 FLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGS 
                   
                   
               
               
                   
                 SDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDS 
                   
                   
               
               
                   
                 ACPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDI 
                   
                   
               
               
                   
                 IKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHS 
                   
                   
               
               
                   
                 YFSLTFCVQVQGKSKREKKDRVFTDKTSATVICRK 
                   
                   
               
               
                   
                 NASISVRAQDRYYSSSWSEWASVPCS 
                   
                   
               
               
                   
               
               
                 IL-15 
                   GIHVFILGCFSAGLPKTEA NWVNVISDLKKIEDLI 
                 P40933 
                 30 
               
               
                   
                 QSMHIDATLYTESDVHPSCKVTAMKCFLLELQVIS 
                   
                   
               
               
                   
                 LESGDASIHDTVENLIILANNSLSSNGNVTESGCK 
                   
                   
               
               
                   
                 ECEELEEKNIKEFLQSFVHIVQMFINTS 
                   
                   
               
               
                   
               
               
                 IL-2 
                 APTSSSTKKTQLQLEHLLLDLQMILNGINNYKNPK 
                 P60568 
                 31 
               
               
                   
                 LTRMLTFKFYMPKKATELKHLQCLEEELKPLEEVL 
                   
                   
               
               
                   
                 NLAQSKNFHLRPRDLISNINVIVLELKGSETTFMC 
                   
                   
               
               
                   
                 EYADETATIVEFLNRWITFCQSIISTLT 
                   
                   
               
               
                   
               
               
                 IL-18 
                 
                   MAAEPVEDNCINFVAMKFIDNTLYFIAEDDENLES 
                 
                 Q14116 
                 32 
               
               
                   
                   D YFGKLESKLSVIRNLNDQVLFIDQGNRPLFEDMT 
                   
                   
               
               
                   
                 DSDCRDNAPRTIFIISMYKDSQPRGMAVTISVKCE 
                   
                   
               
               
                   
                 KISTLSCENKIISFKEMNPPDNIKDTKSDIIFFQR 
                   
                   
               
               
                   
                 SVPGHDNKMQFESSSYEGYFLACEKERDLFKLILK 
                   
                   
               
               
                   
                 KEDELGDRSIMFTVQNED 
                   
                   
               
               
                   
               
               
                 GM-CSF 
                 APARSPSPSTQPWEHVNAIQEARRLLNLSRDTAAE 
                 P04141 
                 33 
               
               
                   
                 MNETVEVISEMFDLQEPTCLQTRLELYKQGLRGSL 
                   
                   
               
               
                   
                 TKLKGPLTMMASHYKQHCPPTPETSCATQIITFES 
                   
                   
               
               
                   
                 FKENLKDFLLVIPFDCWEPVQE 
                   
                   
               
               
                   
               
               
                 IL-7 
                 DCDIEGKDGKQYESVLMVSIDQLLDSMKEIGSNCL 
                 P13232 
                 34 
               
               
                   
                 NNEFNFFKRHICDANKEGMFLFRAARKLRQFLKMN 
                   
                   
               
               
                   
                 STGDFDLHLLKVSEGTTILLNCTGQVKGRKPAALG 
                   
                   
               
               
                   
                 EAQPTKSLEENKSLKEQKKLNDLCFLKRLLQEIKT 
                   
                   
               
               
                   
                 CWNKILMGTKEH 
                   
                   
               
               
                   
               
               
                 IL-21 
                 QGQDRHMIRMRQLIDIVDQLKNYVNDLVPEFLPAP 
                 Q9HBE4 
                 35 
               
               
                   
                 EDVETNCEWSAFSCFQKAQLKSANTGNNERIINVS 
                   
                   
               
               
                   
                 IKKLKRKPPSTNAGRRQKHRLTCPSCDSYEKKPPK 
                   
                   
               
               
                   
                 EFLERFKSLLQKMIHQHLSSRTHGSEDS 
                   
                   
               
               
                   
               
               
                 IFN alpha- 
                 CDLPETHSLDNRRTLMLLAQMSRISPSSCLMDRHD 
                 P01562 
                 36 
               
               
                 1/13 
                 FGFPQEEFDGNQFQKAPAISVLHELIQQIFNLFTT 
                   
                   
               
               
                   
                 KDSSAAWDEDLLDKFCTELYQQLNDLEACVMQEER 
                   
                   
               
               
                   
                 VGETPLMNADSILAVKKYFRRITLYLTEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSLSLSTNLQERLRRKE 
                   
                   
               
               
                   
               
               
                 IFN alpha-2 
                 CDLPQTHSLGSRRTLMLLAQMRKISLFSCLKDRHD 
                 P01563 
                 37 
               
               
                   
                 FGFPQEEFGNQFQKAETIPVLHEMIQQIFNLFSTK 
                   
                   
               
               
                   
                 DSSAAWDETLLDKFYTELYQQLNDLEACVIQGVGV 
                   
                   
               
               
                   
                 TETPLMKEDSILAVRKYFQRITLYLKEKKYSPCAW 
                   
                   
               
               
                   
                 EVVRAEIMRSFSLSTNLQESLRSKE 
                   
                   
               
               
                   
               
               
                 IFN alpha-4 
                 CDLPQTHSLGNRRALILLAQMGRISHFSCLKDRHD 
                 P05014 
                 38 
               
               
                   
                 FGFPEEEFDGHQFQKAQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 EDSSAAWEQSLLEKFSTELYQQLNDLEACVIQEVG 
                   
                   
               
               
                   
                 VEETPLMNEDSILAVRKYFQRITLYLTEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSLSFSTNLQKRLRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-5 
                 LGCDLPQTHSLSNRRTLMIMAQMGRISPFSCLKDR 
                 P01569 
                 39 
               
               
                   
                 HDFGFPQEEFDGNQFQKAQAISVLHEMIQQTFNLF 
                   
                   
               
               
                   
                 STKDSSATWDETLLDKFYTELYQQLNDLEACMMQE 
                   
                   
               
               
                   
                 VGVEDTPLMNVDSILTVRKYFQRITLYLTEKKYSP 
                   
                   
               
               
                   
                 CAWEVVRAEIMRSFSLSANLQERLRRKE 
                   
                   
               
               
                   
               
               
                 IFN alpha-6 
                 SLDCDLPQTHSLGHRRTMMLLAQMRRISLFSCLKD 
                 P05013 
                 40 
               
               
                   
                 RHDFRFPQEEFDGNQFQKAEAISVLHEVIQQTFNL 
                   
                   
               
               
                   
                 FSTKDSSVAWDERLLDKLYTELYQQLNDLEACVMQ 
                   
                   
               
               
                   
                 EVWVGGTPLMNEDSILAVRKYFQRITLYLTEKKYS 
                   
                   
               
               
                   
                 PCAWEVVRAEIMRSFSSSRNLQERLRRKE 
                   
                   
               
               
                   
               
               
                 IFN alpha-7 
                 CDLPQTHSLRNRRALILLAQMGRISPFSCLKDRHE 
                 P01567 
                 41 
               
               
                   
                 FRFPEEEFDGHQFQKTQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 EDSSAAWEQSLLEKFSTELYQQLNDLEACVIQEVG 
                   
                   
               
               
                   
                 VEETPLMNEDFILAVRKYFQRITLYLMEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSFSFSTNLKKGLRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-8 
                 CDLPQTHSLGNRRALILLAQMRRISPFSCLKDRHD 
                 P32881 
                 42 
               
               
                   
                 FEFPQEEFDDKQFQKAQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 KDSSAALDETLLDEFYIELDQQLNDLESCVMQEVG 
                   
                   
               
               
                   
                 VIESPLMYEDSILAVRKYFQRITLYLTEKKYSSCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSFSLSINLQKRLKSKE 
                   
                   
               
               
                   
               
               
                 IFN alpha-10 
                 CDLPQTHSLGNRRALILLGQMGRISPFSCLKDRHD 
                 P01566 
                 43 
               
               
                   
                 FRIPQEEFDGNQFQKAQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 EDSSAAWEQSLLEKFSTELYQQLNDLEACVIQEVG 
                   
                   
               
               
                   
                 VEETPLMNEDSILAVRKYFQRITLYLIERKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSLSFSTNLQKRLRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-14 
                 CNLSQTHSLNNRRTLMLMAQMRRISPFSCLKDRHD 
                 P01570 
                 44 
               
               
                   
                 FEFPQEEFDGNQFQKAQAISVLHEMMQQTFNLFST 
                   
                   
               
               
                   
                 KNSSAAWDETLLEKFYIELFQQMNDLEACVIQEVG 
                   
                   
               
               
                   
                 VEETPLMNEDSILAVKKYFQRITLYLMEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSLSFSTNLQKRLRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-16 
                 CDLPQTHSLGNRRALILLAQMGRISHFSCLKDRYD 
                 P05015 
                 45 
               
               
                   
                 FGFPQEVFDGNQFQKAQAISAFHEMIQQTFNLFST 
                   
                   
               
               
                   
                 KDSSAAWDETLLDKFYIELFQQLNDLEACVTQEVG 
                   
                   
               
               
                   
                 VEEIALMNEDSILAVRKYFQRITLYLMGKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSFSFSTNLQKGLRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-17 
                 CDLPQTHSLGNRRALILLAQMGRISPFSCLKDRHD 
                 P01571 
                 46 
               
               
                   
                 FGLPQEEFDGNQFQKTQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 EDSSAAWEQSLLEKFSTELYQQLNNLEACVIQEVG 
                   
                   
               
               
                   
                 MEETPLMNEDSILAVRKYFQRITLYLTEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSLSFSTNLQKILRRKD 
                   
                   
               
               
                   
               
               
                 IFN alpha-21 
                 CDLPQTHSLGNRRALILLAQMGRISPFSCLKDRHD 
                 P01568 
                 47 
               
               
                   
                 FGFPQEEFDGNQFQKAQAISVLHEMIQQTFNLFST 
                   
                   
               
               
                   
                 KDSSATWEQSLLEKFSTELNQQLNDLEACVIQEVG 
                   
                   
               
               
                   
                 VEETPLMNVDSILAVKKYFQRITLYLTEKKYSPCA 
                   
                   
               
               
                   
                 WEVVRAEIMRSFSLSKIFQERLRRKE 
                   
                   
               
               
                   
               
               
                 IFN beta-1 
                 MSYNLLGFLQRSSNFQCQKLLWQLNGRLEYCLKDR 
                 P01574 
                 48 
               
               
                   
                 MNFDIPEEIKQLQQFQKEDAALTIYEMLQNIFAIF 
                   
                   
               
               
                   
                 RQDSSSTGWNETIVENLLANVYHQINHLKTVLEEK 
                   
                   
               
               
                   
                 LEKEDFTRGKLMSSLHLKRYYGRILHYLKAKEYSH 
                   
                   
               
               
                   
                 CAWTIVRVEILRNFYFINRLTGYLRN 
                   
                   
               
               
                   
               
               
                 IFN gamma 
                 QDPYVKEAENLKKYFNAGHSDVADNGTLFLGILKN 
                 P01579 
                 49 
               
               
                   
                 WKEESDRKIMQSQIVSFYFKLFKNFKDDQSIQKSV 
                   
                   
               
               
                   
                 ETIKEDMNVKFFNSNKKKRDDFEKLTNYSVTDLNV 
                   
                   
               
               
                   
                 QRKAIHELIQVMAELSPAAKTGKRKRSQMLFRG RR   
                   
                   
               
               
                   
                 
                   ASQ 
                 
                   
                   
               
               
                   
               
               
                 IL-17A 
                 GITIPRNPGCPNSEDKNFPRTVMVNLNIHNRNTNT 
                 Q16552 
                 50 
               
               
                   
                 NPKRSSDYYNRSTSPWNLHRNEDPERYPSVIWEAK 
                   
                   
               
               
                   
                 CRHLGCINADGNVDYHMNSVPIQQEILVLRREPPH 
                   
                   
               
               
                   
                 CPNSFRLEKILVSVGCTCVTPIVHHVA 
                   
                   
               
               
                   
               
               
                 IL-17F 
                 RKIPKVGHTFFQKPESCPPVPGGSMKLDIGIINEN 
                 Q96PD4 
                 51 
               
               
                   
                 QRVSMSRNIESRSTSPWNYTVTWDPNRYPSEVVQA 
                   
                   
               
               
                   
                 QCRNLGCINAQGKEDISMNSVPIQQETLVVRRKHQ 
                   
                   
               
               
                   
                 GCSVSFQLEKVLVTVGCTCVTPVIHHVQ 
                   
                   
               
               
                   
               
               
                 IL-23 alpha 
                 RAVPGGSSPAWTQCQQLSQKLCTLAWSAHPLVGHM 
                 Q9NPF7 
                 52 
               
               
                 (p19) 
                 DLREEGDEETTNDVPHIQCGDGCDPQGLRDNSQFC 
                   
                   
               
               
                   
                 LQRIHQGLIFYEKLLGSDIFTGEPSLLPDSPVGQL 
                   
                   
               
               
                   
                 HASLLGLSQLLQPEGHHWETQQIPSLSPSQPWQRL 
                   
                   
               
               
                   
                 LLRFKILRSLQAFVAVAARVFAHGAATLSP 
                   
                   
               
               
                   
               
               
                 IL-3 
                 APMTQTTPLKTSWVNCSNMIDEIITHLKQPPLPLL 
                 P08700 
                 53 
               
               
                   
                 DFNNLNGEDQDILMENNLRRPNLEAFNRAVKSLQN 
                   
                   
               
               
                   
                 ASAIESILKNLLPCLPLATAAPTRHPIHIKDGDWN 
                   
                   
               
               
                   
                 EFRRKLTFYLKTLENAQAQQTTLSLAIF 
                   
                   
               
               
                   
               
               
                 IL-4 
                 HKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAA 
                 P05112 
                 54 
               
               
                   
                 SKNTTEKETFCRAATVLRQFYSHHEKDTRCLGATA 
                   
                   
               
               
                   
                 QQFHRHKQLIRFLKRLDRNLWGLAGLNSCPVKEAN 
                   
                   
               
               
                   
                 QSTLENFLERLKTIMREKYSKCSS 
                   
                   
               
               
                   
               
               
                 IL-5 
                 IPTEIPTSALVKETLALLSTHRTLLIANETLRIPV 
                 P05113 
                 55 
               
               
                   
                 PVHKNHQLCTEEIFQGIGTLESQTVQGGTVERLFK 
                   
                   
               
               
                   
                 NLSLIKKYIDGQKKKCGEERRRVNQFLDYLQEFLG 
                   
                   
               
               
                   
                 VMNTEWIIES 
                   
                   
               
               
                   
               
               
                 IL-6 
                 VPPGEDSKDVAAPHRQPLTSSERIDKQIRYILDGI 
                 P05231 
                 56 
               
               
                   
                 SALRKETCNKSNMCESSKEALAENNLNLPKMAEKD 
                   
                   
               
               
                   
                 GCFQSGFNEETCLVKIITGLLEFEVYLEYLQNRFE 
                   
                   
               
               
                   
                 SSEEQARAVQMSTKVLIQFLQKKAKNLDAITTPDP 
                   
                   
               
               
                   
                 TTNASLLTKLQAQNQWLQDMTTHLILRSFKEFLQS 
                   
                   
               
               
                   
                 SLRALRQM 
                   
                   
               
               
                   
               
               
                 IL-9 
                 QGCPTLAGILDINFLINKMQEDPASKCHCSANVTS 
                 P15248 
                 57 
               
               
                   
                 CLCLGIPSDNCTRPCFSERLSQMTNTTMQTRYPLI 
                   
                   
               
               
                   
                 FSRVKKSVEVLKNNKCPYFSCEQPCNQTTAGNALT 
                   
                   
               
               
                   
                 FLKSLLEIFQKEKMRGMRGKI 
                   
                   
               
               
                   
               
               
                 IL-11 
                 PGPPPGPPRVSPDPRAELDSTVLLTRSLLADTRQL 
                 P20809 
                 58 
               
               
                   
                 AAQLRDKFPADGDHNLDSLPTLAMSAGALGALQLP 
                   
                   
               
               
                   
                 GVLTRLRADLLSYLRHVQWLRRAGGSSLKTLEPEL 
                   
                   
               
               
                   
                 GTLQARLDRLLRRLQLLMSRLALPQPPPDPPAPPL 
                   
                   
               
               
                   
                 APPSSAWGGIRAAHAILGGLHLTLDWAVRGLLLLK 
                   
                   
               
               
                   
                 TRL 
                   
                   
               
               
                   
               
               
                 IL-13 
                 LTCLGGFASPGPVPPSTALRELIEELVNITQNQKA 
                 P35225 
                 59 
               
               
                   
                 PLCNGSMVWSINLTAGMYCAALESLINVSGCSAIE 
                   
                   
               
               
                   
                 KTQRMLSGFCPHKVSAGQFSSLHVRDTKIEVAQFV 
                   
                   
               
               
                   
                 KDLLLHLKKLFREGRFN 
                   
                   
               
               
                   
               
               
                 IL-27 alpha 
                 FPRPPGRPQLSLQELRREFTVSLHLARKLLSEVRG 
                 Q8NEV9 
                 60 
               
               
                 (p28) 
                 QAHRFAESHLPGVNLYLLPLGEQLPDVSLTFQAWR 
                   
                   
               
               
                   
                 RLSDPERLCFISTTLQPFHALLGGLGTQGRWTNME 
                   
                   
               
               
                   
                 RMQLWAMRLDLRDLQRHLRFQVLAAGFNLPEEEEE 
                   
                   
               
               
                   
                 EEEEEEEERKGLLPGALGSALQGPAQVSWPQLLST 
                   
                   
               
               
                   
                 YRLLHSLELVLSRAVRELLLLSKAGHSVWPLGFPT 
                   
                   
               
               
                   
                 LSPQP 
                   
                   
               
               
                   
               
               
                 IL-27 beta 
                 RKGPPAALTLPRVQCRASRYPIAVDCSWTLPPAPN 
                 Q14213 
                 61 
               
               
                 (EBI3), IL-35 
                 STSPVSFIATYRLGMAARGHSWPCLQQTPTSTSCT 
                   
                   
               
               
                 beta 
                 ITDVQLFSMAPYVLNVTAVHPWGSSSSFVPFITEH 
                   
                   
               
               
                   
                 IIKPDPPEGVRLSPLAERQLQVQWEPPGSWPFPEI 
                   
                   
               
               
                   
                 FSLKYWIRYKRQGAARFHRVGPIEATSFILRAVRP 
                   
                   
               
               
                   
                 RARYYVQVAAQDLTDYGELSDWSLPATATMSLGK 
                   
                   
               
               
                   
               
               
                 Erythro- 
                 APPRLICDSRVLERYLLEAKEAENITTGCAEHCSL 
                 P01588 
                 62 
               
               
                 poietin 
                 NENITVPDTKVNFYAWKRMEVGQQAVEVWQGLALL 
                   
                   
               
               
                   
                 SEAVLRGQALLVNSSQPWEPLQLHVDKAVSGLRSL 
                   
                   
               
               
                   
                 TTLLRALGAQKEAISPPDAASAAPLRTITADTFRK 
                   
                   
               
               
                   
                 LFRVYSNFLRGKLKLYTGEACRTGDR 
                   
                   
               
               
                   
               
               
                 G-CSF 
                 ATPLGPASSLPQSFLLKCLEQVRKIQGDGAALQEK 
                 P09919 
                 63 
               
               
                   
                 LVSECATYKLCHPEELVLLGHSLGIPWAPLSSCPS 
                   
                   
               
               
                   
                 QALQLAGCLSQLHSGLFLYQGLLQALEGISPELGP 
                   
                   
               
               
                   
                 TLDTLQLDVADFATTIWQQMEELGMAPALQPTQGA 
                   
                   
               
               
                   
                 MPAFASAFQRRAGGVLVASHLQSFLEVSYRVLRHL 
                   
                   
               
               
                   
                 AQP 
                   
                   
               
               
                   
               
               
                 Growth  
                 FPTIPLSRLFDNAMLRAHRLHQLAFDTYQEFEEAY 
                 P01241 
                 64 
               
               
                 hormone 
                 IPKEQKYSFLQNPQTSLCFSESIPTPSNREETQQK 
                   
                   
               
               
                   
                 SNLELLRISLLLIQSWLEPVQFLRSVFANSLVYGA 
                   
                   
               
               
                   
                 SDSNVYDLLKDLEEGIQTLMGRLEDGSPRTGQIFK 
                   
                   
               
               
                   
                 QTYSKFDTNSHNDDALLKNYGLLYCFRKDMDKVET 
                   
                   
               
               
                   
                 FLRIVQCRSVEGSCGF 
                   
                   
               
               
                   
               
               
                 Prolactin 
                 LPICPGGAARCQVTLRDLFDRAVVLSHYIHNLSSE 
                 P01236 
                 65 
               
               
                   
                 MFSEFDKRYTHGRGFITKAINSCHTSSLATPEDKE 
                   
                   
               
               
                   
                 QAQQMNQKDFLSLIVSILRSWNEPLYHLVTEVRGM 
                   
                   
               
               
                   
                 QEAPEAILSKAVEIEEQTKRLLEGMELIVSQVHPE 
                   
                   
               
               
                   
                 TKENEIYPVWSGLPSLQMADEESRLSAYYNLLHCL 
                   
                   
               
               
                   
                 RRDSHKIDNYLKLLKCRIIHNNNC 
                   
                   
               
               
                   
               
               
                 Oncostatin M 
                 AAIGSCSKEYRVLLGQLQKQTDLMQDTSRLLDPYI 
                 P13725 
                 66 
               
               
                   
                 RIQGLDVPKLREHCRERPGAFPSEETLRGLGRRGF 
                   
                   
               
               
                   
                 LQTLNATLGCVLHRLADLEQRLPKAQDLERSGLNI 
                   
                   
               
               
                   
                 EDLEKLQMARPNILGLRNNIYCMAQLLDNSDTAEP 
                   
                   
               
               
                   
                 TKAGRGASQPPTPTPASDAFQRKLEGCRFLHGYHR 
                   
                   
               
               
                   
                 FMHSVGRVFSKWGESPNRSRR HSPHQALRKGVRRT   
                   
                   
               
               
                   
                 
                   RPSRKGKRLMTRGQLPR 
                 
                   
                   
               
               
                   
               
               
                 Leukemia 
                 SPLPITPVNATCAIRHPCHNNLMNQIRSQLAQLNG 
                 P15018 
                 67 
               
               
                 inhibitory 
                 SANALFILYYTAQGEPFPNNLDKLCGPNVTDFPPF 
                   
                   
               
               
                 factor 
                 HANGTEKAKLVELYRIVVYLGTSLGNITRDQKILN 
                   
                   
               
               
                   
                 PSALSLHSKLNATADILRGLLSNVLCRLCSKYHVG 
                   
                   
               
               
                   
                 HVDVTYGPDTSGKDVFQKKKLGCQLLGKYKQIIAV 
                   
                   
               
               
                   
                 LAQAF 
                   
                   
               
               
                   
               
               
                 IL-22 
                 APISSHCRLDKSNFQQPYITNRTFMLAKEASLADN 
                 Q9GZX6 
                 68 
               
               
                   
                 NTDVRLIGEKLFHGVSMSERCYLMKQVLNFTLEEV 
                   
                   
               
               
                   
                 LFPQSDRFQPYMQEVVPFLARLSNRLSTCHIEGDD 
                   
                   
               
               
                   
                 LHIQRNVQKLKDTVKKLGESGEIKAIGELDLLFMS 
                   
                   
               
               
                   
                 LRNACI 
                   
                   
               
               
                   
               
               
                 IL-10 
                 SPGQGTQSENSCTHFPGNLPNMLRDLRDAFSRVKT 
                 P22301 
                 69 
               
               
                   
                 FFQMKDQLDNLLLKESLLEDFKGYLGCQALSEMIQ 
                   
                   
               
               
                   
                 FYLEEVMPQAENQDPDIKAHVNSLGENLKTLRLRL 
                   
                   
               
               
                   
                 RRCHRFLPCENKSKAVEQVKNAFNKLQEKGIYKAM 
                   
                   
               
               
                   
                 SEFDIFINYIEAYMTMKIRN 
               
               
                   
               
            
           
         
       
     
     In some embodiments, at least one of the first or second peptide is a cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion thereof. In some embodiments, the other of the first or second peptide is a tag or other peptide moiety. 
     In some embodiments, both of the first and second peptides are a cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion thereof. In some embodiments, the cytokine or chemokine is a monomer. In some embodiments, the cytokine or chemokine is homodimer or heterodimer and the first or second cytokine is a subunit of the homodimer of heterodimer. In some embodiments, the first and second peptides are the same cytokine or chemokine or functional portion thereof or are the same subunit of the same cytokine or chemokine. In some embodiments, the first and second peptides are a different cytokine or chemokine or functional portion thereof or are a different subunit of the same or different cytokine or chemokine. 
     In some embodiments, the cytokine or chemokine is a multimeric protein, such as is a homodimer or heterodimer, in which the first peptide is a first subunit of a cytokine or chemokine and the second peptide is a second subunit of the cytokine or chemokine. In some aspects, the joining region containing the targeting moiety connects the first and second subunits, such as the first and second subunits of a cytokine or chemokine that is a homodimer or heterodimer. 
     In some embodiments, the cytokine or chemokine is interleukin-12 (IL-12). Generally, IL-12 is a heterodimeric cytokine containing a p35 and a p40 subunit covalently linked by a disulfide bridge. In some embodiments, the first subunit of the IL-12 immunomodulatory polypeptide is p35 or p40 or a functional portion thereof and the second subunit is the other of p35 and p40 or a functional portion thereof. In some such cases, the joining region containing the targeting moiety connects or joins the p35 and p40 subunits of IL-12. In some aspects, the p35 subunit has the sequence set forth in SEQ ID NO: 10 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:10. In some aspects, the p40 subunit has the sequence set forth in SEQ ID NO: 11 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:11. 
     In some embodiments, the cytokine or chemokine is interleukin-23 (IL-23). Generally, IL-23 is a heterodimeric cytokine containing an IL-12p40 and an IL-23alpha subunit. In some embodiments, the first subunit of the IL-23 immunomodulatory polypeptide is IL-12p40 or IL-23alpha or a functional portion thereof and the second subunit is the other of IL-12p40 and IL-23alpha or a functional portion thereof. In some such cases, the joining region containing the targeting moiety connects or joins the IL-12p40 and an IL-23alpha subunit of IL-23. In some aspects, the IL-23alpha subunit has the sequence set forth in SEQ ID NO: 52 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:52. In some aspects, the p40 subunit has the sequence set forth in SEQ ID NO: 11 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:11. 
     In some embodiments, the cytokine or chemokine is interleukin-27 (IL-27). Generally, IL-27 is a heterodimeric cytokine containing an IL-27 alpha (p28) and an IL-27 beta (EBI3) subunit. In some embodiments, the first subunit of the IL-27 immunomodulatory polypeptide is p28 or EBI3 or a functional portion thereof and the second subunit is the other of p28 and EBI3 or a functional portion thereof. In some such cases, the joining region containing the targeting moiety connects or joins the p28 and EBI3 subunits of IL-27. In some aspects, the p28 subunit has the sequence set forth in SEQ ID NO: 60 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:60. In some aspects, the EBI3 subunit has the sequence set forth in SEQ ID NO: 61 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:61. 
     In some embodiments, the cytokine or chemokine is interleukin-35 (IL-35). Generally, IL-35 is a heterodimeric cytokine containing an IL-12p35 and an IL-27 beta (EBI3) subunit covalently linked by a disulfide bridge. In some embodiments, the first subunit of the IL-35 immunomodulatory polypeptide is p35 or EBI3 or a functional portion thereof and the second subunit is the other of p35 and EBI3 or a functional portion thereof. In some such cases, the joining region containing the targeting moiety connects or joins the p35 and EBI3 subunits of IL-35. In some aspects, the p35 subunit has the sequence set forth in SEQ ID NO: 10 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:10. In some aspects, the EBI3 subunit has the sequence set forth in SEQ ID NO: 61 or a sequence having at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:61. 
     In some embodiments, the cytokine or chemokine is or comprises interleukin-15 (IL-15). Generally, IL-15 is a cytokine and may be soluble or membrane-bound. In some embodiments, IL-15 is monomeric and in other embodiments, IL-15 is heterodimeric. In some embodiments, IL-15 is associated with IL-15Rα. In some embodiments, the first subunit of the IL-15 immunomodulatory polypeptide is IL-15 or IL-15Rα or a functional portion thereof and the second subunit is the other of IL-15 or IL-15Rα or a functional portion thereof. In some such cases, the joining region containing the targeting moiety connects or joins the IL-15 or IL-15Rα peptides. 
     B. Joining Region 
     In some embodiments, the immunomodulatory polypeptide contains a joining region that connects the first and second peptides, such as the first and second cytokine or chemokine or the first and second subunit of the cytokine or chemokine or functional portions thereof. In some aspects, the joining region contains a targeting moiety, such as a targeting peptide, that binds to a target molecule. In some embodiments, the targeting moiety is directly connected to at least one of the first and second peptides and, in some cases, both of the first and second peptides. In some embodiments, the targeting moiety is indirectly connected to at least one of the first and second peptides and, in some cases, both of the first and second peptides, such as indirectly connective via a linker. In some cases, the joining region further contains one or more polypeptide linkers connecting the targeting moiety to one or both of the first and second peptide. In some aspects, the targeting moiety is flanked by two polypeptide linkers connecting the first and second peptides. 
     In some aspects, the immunomodulatory protein comprises: a first peptide, a targeting moiety and a second peptide. In some aspects, the immunomodulatory protein comprises: a first peptide, a linker, a targeting moiety, and a second peptide. In some aspects, the immunomodulatory protein comprises: a first peptide, a targeting moiety, a linker, and a second peptide. In some aspects, the immunomodulatory protein comprises: a first peptide, a linker, a targeting moiety, a linker and a second peptide. In any of such embodiments, the first and second peptide can be reversed in position. 
     In some embodiments, the joining region does not exceed a maximum length. In some instances, the maximum length of the joining region is or is about no more than 400, 300, 250, 200, 150, 100, 50, 40, 30, 25, 20, 15, 10, or 5 amino acids. In some embodiments, the length of the joining region exceeds 400 amino acids. In some aspects, the length of the joining region, such as including the targeting moiety and optionally one or two linkers, is between or between about 5 and 400 amino acids, such as between or between about 10 and 400 amino acids, 10 and 300 amino acids, 10 and 200 amino acids, 10 and 100 amino acids, 10 and 50 amino acids, 10 and 30 amino acids, 10 and 20 amino acids, 20 and 400 amino acids, 20 and 300 amino acids, 20 and 200 amino acids, 20 and 100 amino acids, 20 and 50 amino acids, 20 and 30 amino acids, 30 and 400 amino acids, 30 and 300 amino acids, 30 and 200 amino acids, 30 and 100 amino acids, 30 and 50 amino acids, 50 and 400 amino acids, 50 and 300 amino acids, 50 and 200 amino acids, 50 and 100 amino acids, 100 and 400 amino acids, 100 and 300 amino acids, 100 and 200 amino acids, 200 and 400 amino acids or 200 and 300 amino acids. In some embodiments, the length of the joining region is between or between about 5 and 50 amino acids, such as 5 and 40 amino acids, 5 and 30 amino acids, 5 and 20 amino acids, 5 and 10 amino acids, 10 and 50 amino acids, 10 and 40 amino acids, 10 and 30 amino acids, 10 and 20 amino acids, 20 and 50 amino acids, 20 and 40 amino acids, 20 and 30 amino acids, 30 and 50 amino acids, 30 and 40 amino acids or 40 and 50 amino acids. 
     1. Targeting Moiety 
     In some aspects, the joining region contains a targeting moiety, such as a targeting peptide that binds to a target molecule on the surface of a cell. In some cases, the joining region contains two or more targeting moieties. In some such cases, the two or more targeting moieties may be the same or different. In some cases, the targeting moiety is human or is derived from a human protein. In some embodiments, the targeting moiety is a binding peptide. In some embodiments, the targeting moiety is an antibody or antigen-binding fragment thereof. 
     In some embodiments, the targeting moiety binds to a target molecule that is a protein, glycoprotein or lipid. In some embodiments, the target molecule is associated with a disease or disorder. In some aspects, the disease or disorder is an infectious disease or disorder, an autoimmune disease, an inflammatory disease, or a tumor or a cancer. In some cases, the target molecule is associated with a tumor or present on a tumor. In some aspects, the target molecule is a tumor antigen. In some embodiments, the target molecule is expressed on the surface of a cell, such as a tumor cell. 
     In some embodiments, the target molecule is selected from among: hepatocyte growth factor (HGF), heparin, VEGF, VEGF-A, VEGFR2, VEGFR3, HER2, PD-1, tenascin-C, CTLA-4, LAGS, PD-L1, EGFR, EPCAM, RANKL, NG2 proteoglycan, CD20, CD52, CD19, CD3, CD30, IL-6, CD38, SLAMF7, GD2, CD13, CD274, CD279, CD40L, and CD47. 
     In some aspects, the targeting moiety has a length of no more than 400, 300, 250, 200, 150, 100, 50, 40, 30, 25, 20, 15, 10, or 5 amino acids. In some aspects, the length of the targeting moiety is between or between about 5 and 400 amino acids, such as between or between about 10 and 400 amino acids, 10 and 300 amino acids, 10 and 200 amino acids, 10 and 100 amino acids, 10 and 50 amino acids, 10 and 30 amino acids, 10 and 20 amino acids, 20 and 400 amino acids, 20 and 300 amino acids, 20 and 200 amino acids, 20 and 100 amino acids, 20 and 50 amino acids, 20 and 30 amino acids, 30 and 400 amino acids, 30 and 300 amino acids, 30 and 200 amino acids, 30 and 100 amino acids, 30 and 50 amino acids, 50 and 400 amino acids, 50 and 300 amino acids, 50 and 200 amino acids, 50 and 100 amino acids, 100 and 400 amino acids, 100 and 300 amino acids, 100 and 200 amino acids, 200 and 400 amino acids or 200 and 300 amino acids. In some embodiments, the length of the joining region is between or between about 5 and 50 amino acids, such as 5 and 40 amino acids, 5 and 30 amino acids, 5 and 20 amino acids, 5 and 10 amino acids, 10 and 50 amino acids, 10 and 40 amino acids, 10 and 30 amino acids, 10 and 20 amino acids, 20 and 50 amino acids, 20 and 40 amino acids, 20 and 30 amino acids, 30 and 50 amino acids, 30 and 40 amino acids or 40 and 50 amino acids. 
     In some embodiments, the targeting moiety binds the target molecule with at least a certain affinity, as measured by any of a number of known methods. In some embodiments, the affinity is represented by a dissociation constant (K D ) or an association constant (K A ). In some embodiments, the affinity is represented by EC50. In some embodiments, the targeting moiety binds, such as specifically binds, to the target molecule with an affinity or K A  (i.e., an equilibrium association constant of a particular binding interaction with units of 1/M; equal to the ratio of the on-rate [k on  or k a ] to the off-rate [k off  or k d ] for this association reaction, assuming bimolecular interaction) equal to or greater than 10 5  M −1 . 
     In some embodiments, the targeting moiety exhibits a binding affinity for the target molecule with a K D  (i.e., an equilibrium dissociation constant of a particular binding interaction with units of M; equal to the ratio of the off-rate [k off  or k d ] to the on-rate [k on  or k a ] for this association reaction, assuming bimolecular interaction) of equal to or less than 10 −5  M. For example, the equilibrium dissociation constant K D  ranges from or from about 10 −5  M to or to about 10 −15  M, such as from or from about 10 −6  M to or to about 10 −12  M, from or from about 10 −7  M to or to about 10 −11  M, from or from about 10 −6  M to or to about 10 −8  M, or from or from about 10 −7  M to or to about 10 −8  M. In some embodiments, the K D  of the targeting moiety to the target molecule is at or about or less than at or about 100 nM, 50 nM, 40 nM, 30 nM, 25 nM, 20 nM, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 nM, such as between at or about 1 nM and at or about 15 nM, e.g., between at or about 5 and at or about 10 nM. In some embodiments, the K D  of the targeting moiety to the target molecule is at or about or less than at or about 1 nM, 100 picomolar (pM), 90 pM, 80 pM, 70 pM, 60 pM, 50 pM, 40 pM, 30 pM, 25 pM, 20 pM, 15 pM, 10 pM, or 1 pM, such as between at or about 10 pM and at or about 100 pM, e.g., between at or about 25 pM and at or about 75 pM. 
     The on-rate (association rate constant; k on  or k a ; units of 1/M·sec or M −1  sec −1 ) and the off-rate (dissociation rate constant; k off  or k d ; units of 1/s or sec −1 ) can be determined using any of the assay methods known in the art, for example, surface plasmon resonance (SPR, e.g., using a Biacore instrument). In some embodiments, the targeting moiety binds the target molecule with a higher affinity that the cytokine or chemokine binds its receptor. 
     In some embodiments, the targeting moiety exhibits a k off  rate for binding the target molecule that is about 0.5×10 −4  sec −1  or less, about 1×10 −4  sec −1  or less, about 2×10 −4  sec −1  or less, about 3×10 −4  sec −1  or less, about 4×10 −4  sec −1  or less, about 5×10 −4  sec −1  or less, about 1×10 −3  sec −1  or less, about 1.5×10 −3  sec −1  or less, about 2×10 −3  sec −1  or less, about 3×10 −3  sec −1  or less, about 4×10 −3  sec −1  or less, about 5×10 −3  sec −1  or less, about 1×10 −2  sec or less, or about 5×10 −1  sec −1  or less. 
     In some embodiments, the targeting moiety is or contains a peptide binding motif. In some aspects, the targeting moiety is or is derived from a hepatocyte growth factor (HGF) binding peptide (HGFBP), a heparin binding peptide (HBP) (e.g., BMP4 or fibronectin), a VEGF binding peptide, a VEGF-A binding peptide, a VEGFR (e.g. VEGFR2 or VEGFR3) binding peptide, an EPCAM binding peptide, a HER2 binding peptide, a PD-1 binding peptide, a tenascin-C binding peptide, a CTLA-4 binding peptide, a LAGS binding peptide, a PD-L1 binding peptide, an EGFR binding peptide, a RANKL binding peptide, a CD20 binding peptide, a CD52 binding peptide, a CD19 binding peptide, a CD3 binding peptide, a CD30 binding peptide, a IL-6 binding peptide, a CD38 binding peptide, a SLAMF7 binding peptide, a GD2 binding peptide, a CD274 binding peptide, a CD279 binding peptide, a CD40L binding peptide, a CD47 binding peptide, a CD13 binding peptide, an NGR motif, an RGD motif, or an NG2 proteoglycan binding peptide. In some cases, the targeting moiety is or contains an HGF binding peptide (HGFBP), an HBP or an EGFR binding peptide (EGFRBP). In some instances, the heparin binding peptide (HBP) is derived from fibronectin or BMP4, and/or is of bovine origin. Examples of such binding peptides are known, see e.g. Tam et al. (2009) Journal of Molecular Biology, 385:79-90; Ahsan et al. (2014) Neoplasia, 16:105-14; Binetruy-Tournaire et al. (2000) EMBO J., 19:1525-1533; Vicari et al. (2011) J. Biol. Chem., 286:13612-25; Andersson et al. (2004) FEBS J., 271: 1219-1226; Abcam Cat. No. ab152112 (Cambridge, Mass.); Chen et al. (2015) BioMed Research International, Article ID 237969; U.S. Pat. No. 8,188,220. Targeting moieties also can be peptides that are identified in binding assays as peptides that bind a selected target molecule. 
     Table 2 provides non-limiting examples of peptide binding motifs that can be a targeting moiety. In some embodiments, the targeting moiety is or comprises a sequence of amino acids set forth in any of SEQ ID NOS: 13-16 and 27-28 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 89%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to any of SEQ ID NOS: 13-16 and 27-28. 
     
       
         
           
               
             
               
                 TABLE 2 
               
             
            
               
                   
               
               
                 Peptide Binding Targeting Moiety 
               
            
           
           
               
               
               
            
               
                   
                   
                 SEQ ID 
               
               
                 Name 
                 Sequence 
                 NO. 
               
               
                   
               
               
                 Heparin binding peptide, 
                 RKKNPNCRRH 
                  13 
               
               
                 BMP4 
                   
                   
               
               
                   
               
               
                 Heparin binding peptide, 
                 KNNQKSEPLIGRKKT 
                  14 
               
               
                 fibronectin 
                   
                   
               
               
                   
               
               
                 HGF binding peptide 
                 VWNWVCFRDVGCDWVL 
                  15 
               
               
                   
               
               
                 EGFR binding peptide 
                 SVDNPHVC 
                  16 
               
               
                 (EGFRBP) 
                   
                   
               
               
                   
               
               
                 EGFR binding peptide 
                 YHWYGYTPQNVI 
                 108 
               
               
                   
               
               
                 EGFR binding peptide 
                 YRWYGYTPQNVI 
                 109 
               
               
                   
               
               
                 VEGF binding peptide 
                 ATWLPPR 
                  26 
               
               
                   
               
               
                 VEGFR binding peptide 
                 ITMQCGIHQGQHPKIR 
                  27 
               
               
                   
                 MICEMSF 
                   
               
               
                   
               
               
                 VEGFR binding peptide 
                 ITMQIMRIKPHQGQHI 
                 118 
               
               
                   
                 GEMSF 
                   
               
               
                   
               
               
                 VEGFR3 binding peptide 
                 PCAIWF 
                 110 
               
               
                   
               
               
                 VEGFR3 binding peptide 
                 WVCSGG 
                 111 
               
               
                   
               
               
                 bovine origin heparin 
                 WQPPRARI 
                  28 
               
               
                 binding peptide 
                   
                   
               
               
                   
               
               
                 NGR motif 
                 NGRNGRNGR 
                 112 
               
               
                 (e.g., CD13 binding 
                   
                   
               
               
                 peptide; angiogenesis 
                   
                   
               
               
                 targeting peptide 
                   
                   
               
               
                   
               
               
                 RGD motif 
                 RGDRGDRGD 
                 113 
               
               
                   
               
               
                 NG2 proteoglycan binding 
                 TAASGVRSMH 
                 114 
               
               
                 peptide 
                   
                   
               
               
                   
               
               
                 NG2 proteoglycan binding 
                 LTLRWVGLMS 
                 115 
               
               
                 peptide 
                   
                   
               
               
                   
               
               
                 HER2 binding peptide 
                 NKFNKGMRYWGALGGN 
                 116 
               
               
                   
                 GKRGIRGYM 
                   
               
               
                   
               
               
                 EPCAM binding peptide 
                 YEVHTYYLD 
                 117 
               
               
                   
               
            
           
         
       
     
     In some aspects, the targeting moiety is or comprises an antibody or antibody fragment. Among the antibodies are human antibodies, including any known to bind a targeting molecule as described. 
     The term “antibody” herein is used in the broadest sense and includes polyclonal and monoclonal antibodies, including intact antibodies and functional (antigen-binding) antibody fragments, including fragment antigen binding (Fab) fragments, F(ab′) 2  fragments, Fab′ fragments, Fv fragments, recombinant IgG (rIgG) fragments, variable heavy chain (V H ) regions capable of specifically binding the antigen, single chain antibody fragments, including single chain variable fragments (scFv), and single domain antibodies (e.g., sdAb, sdFv, nanobody) fragments. The term encompasses genetically engineered and/or otherwise modified forms of immunoglobulins, such as intrabodies, peptibodies, chimeric antibodies, fully human antibodies, humanized antibodies, and heteroconjugate antibodies, multispecific, e.g., bispecific, antibodies, diabodies, triabodies, and tetrabodies, tandem di-scFv, tandem tri-scFv. Unless otherwise stated, the term “antibody” should be understood to encompass functional antibody fragments thereof. The term also encompasses intact or full-length antibodies, including antibodies of any class or sub-class, including IgG and sub-classes thereof, IgM, IgE, IgA, and IgD. 
     In some embodiments, the heavy and light chains of an antibody can be full-length or can be an antigen-binding portion (a Fab, F(ab′)2, Fv or a single chain Fv fragment (scFv)). In other embodiments, the antibody heavy chain constant region is chosen from, e.g., IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgD, and IgE, particularly chosen from, e.g., IgG1, IgG2, IgG3, and IgG4, more particularly, IgG1 (e.g., human IgG1). In another embodiment, the antibody light chain constant region is chosen from, e.g., kappa or lambda, particularly kappa. 
     Among the provided antibodies are antibody fragments. An “antibody fragment” refers to a molecule other than an intact antibody that comprises a portion of an intact antibody that binds the antigen to which the intact antibody binds. Examples of antibody fragments include but are not limited to Fv, Fab, Fab′, Fab′-SH, F(ab′) 2 ; diabodies; linear antibodies; variable heavy chain (V H ) regions, single-chain antibody molecules such as scFvs and single-domain V H  single antibodies; and multispecific antibodies formed from antibody fragments. In particular embodiments, the antibodies are single-chain antibody fragments comprising a variable heavy chain region and/or a variable light chain region, such as scFvs. 
     The term “variable region” or “variable domain”, when used in reference to an antibody, such as an antibody fragment, refers to the domain of an antibody heavy or light chain that is involved in binding the antibody to antigen. The variable domains of the heavy chain and light chain (V H  and V L , respectively) of a native antibody generally have similar structures, with each domain comprising four conserved framework regions (FRs) and three CDRs. (See, e.g., Kindt et al. Kuby Immunology, 6th ed., W.H. Freeman and Co., page 91 (2007). A single V H  or V L  domain may be sufficient to confer antigen-binding specificity. Furthermore, antibodies that bind a particular antigen may be isolated using a V H  or V L  domain from an antibody that binds the antigen to screen a library of complementary V L  or V H  domains, respectively. See, e.g., Portolano et al., J. Immunol. 150:880-887 (1993); Clarkson et al., Nature 352:624-628 (1991). 
     Single-domain antibodies are antibody fragments comprising all or a portion of the heavy chain variable domain or all or a portion of the light chain variable domain of an antibody. In certain embodiments, a single-domain antibody is a human single-domain antibody. 
     Antibody fragments can be made by various techniques, including but not limited to proteolytic digestion of an intact antibody as well as production by recombinant host cells. In some embodiments, the antibodies are recombinantly-produced fragments, such as fragments comprising arrangements that do not occur naturally, such as those with two or more antibody regions or chains joined by synthetic linkers, e.g., peptide linkers, and/or that are may not be produced by enzyme digestion of a naturally-occurring intact antibody. In some aspects, the antibody fragments are scFvs. 
     In some such aspects, the targeting moiety is or comprises an antibody fragment that is a single chain fragment. In some instances, the antibody fragment comprises antibody variable regions joined by a flexible linker, such as a linker set forth in SEQ ID NO:9, SEQ ID NO:22 or SEQ ID NO: 23. In some examples, the antibody fragment is or contains an scFv. Thus, in some instances, the targeting moiety contains a variable heavy (VH) chain and a variable light (VL) chain. In some embodiments, the targeting moiety is or contains a VH chain, but does not contain a VL chain. In some such aspects, the targeting moiety is or contains a high-affinity, e.g., super high-affinity, VH chain. In some embodiments, the targeting moiety is or contains a variable heavy (VH) chain and/or variable light (VL) chain of an antibody. 
     In some embodiments, the antibody is an anti-hepatocyte growth factor (HGF) antibody, an anti-heparin antibody, and anti-VEGF antibody, and anti-VEGF-A antibody, an anti-VEGFR antibody, an anti-VEGFR2 antibody, an anti-HER2 antibody, an anti-PD-1 antibody, an anti-tenascin-C antibody, an anti-CTLA-4, an anti-LAG3 antibody, an anti-PD-L1 antibody, an anti-EGFR antibody, an anti-EPCAM antibody, an anti-RANKL antibody, and anti-CD20 antibody, an anti-CD52 antibody, an anti-CD19 antibody, an anti-CD3 antibody, an anti-CD30 antibody, an anti-IL-6 antibody, an anti-CD38 antibody, an anti-SLAMF7 antibody, an anti-GD2 antibody, an anti-CD274 antibody, an anti-CD279 antibody, an anti-CD40L antibody, and an anti-CD47-antibody or antigen-binding fragments thereof. 
     In some such cases, the antibody is or is derived from a VH and/or a VL chain of trastuzumab, pertuzumab, ramucirumab, atezolizumab, bevacizumab, panitumumab, cetuximab, necitumumab, denosumab, nivolumab, pembrolizumab, rituximab, ofatumumab, obinutuzumab, alemtuzumab, blinatumomab, brentuximab vedotin, siltuximab, ipilimumab, daratumumab, elotuzumab, dinutuximab, or catumaxomab or antigen-binding fragments thereof. 
     In some instances, the targeting moiety is or contains an anti-EPCAM antibody. In some embodiments, the targeting moiety has the sequence set forth in SEQ ID NO: 17, or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or more sequence identity to such a sequence and binds to the target molecule. 
     2. Polypeptide Linker 
     In some embodiments, the joining region further contains at least one polypeptide linker linking the targeting moiety to the first or second peptide, such as the first or second subunit of the cytokine or chemokine. In some cases, the joining region contains two polypeptide linkers. In some such cases, one of the polypeptide linkers links the first peptide, such as the first subunit of the cytokine or chemokine, to the targeting moiety and the other polypeptide linker links the second peptide, such as the second subunit of the cytokine or chemokine, to the targeting moiety. Thus, in some cases, the targeting moiety is contained between a first and a second polypeptide linker, which together form the joining region. 
     In some embodiments, the polypeptide linker contains from about 2 to about 20 amino acids, such as about 5 to about 15 amino acids, such as 15 or about 15 amino acids. In some cases, the polypeptide linker has the sequence GGGGS(n), wherein n is greater than or equal to one. For example, in some instances, where n=1, the polypeptide linker has the sequence set forth in SEQ ID NO: 7. In some cases, where n=2, the polypeptide linker has the sequence set forth in SEQ ID NO: 8. In some aspects, where n=3, the polypeptide linker has the sequence set forth in SEQ ID NO: 9. 
     C. Exemplary Immunomodulatory Polypeptides 
     In some aspects, the immunomodulatory polypeptide is or contains an IL-12 polypeptide. In some embodiments, the immunomodulatory polypeptide contains a p35 subunit of IL-12, a p40 subunit of IL-12, and a joining region connecting the p35 and p40 subunits. In some such embodiments, the joining region contains a targeting moiety that binds to a target molecule. 
     In some instances, the joining region further contains at least one polypeptide linker linking the targeting moiety to the p35 subunit or the p40 subunit. For example, in some aspects, the p40 subunit is connected to a first polypeptide linker that is also attached to a first end of the targeting moiety, and the second end of the targeting moiety is connected to a second polypeptide linker that is also attached to one end of the p35 subunit. 
     In some embodiments, the IL-12 immunomodulatory polypeptide exhibits increased activity to stimulate via the IL-12R compared to a recombinant IL-12 not comprising the joining region. In some aspects, the immunomodulatory polypeptide exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. In some embodiments, the IL-12 immunomodulatory polypeptides or cells containing such a peptide exhibit increased or decreased activity to stimulate via the IL-12R compared to a recombinant IL-12 not containing the joining region. 
     In some embodiments, the IL-12 immunomodulatory polypeptide exhibits an increased binding affinity for the IL-12R. In some embodiments, the IL-12 immunomodulatory polypeptide exhibits a decreased binding affinity for the IL-12R. In some examples, the equilibrium dissociation constant K D  of the IL-12 immunomodulatory polypeptide and the IL-12R is from or from about 10 −5  M to or to about 10 −15  M, such as from or from about 10 −6  M to or to about 10 −12  M, from or from about 10 −7  M to or to about 10 −11  M, from or from about 10 −6  M to or to about 10 −8  M, or from or from about 10 −7  M to or to about 10 −8  M. In some embodiments, the K D  of the IL-12 immunomodulatory polypeptide and the IL-12R is at or about or less than at or about 100 nM, 50 nM, 40 nM, 30 nM, 25 nM, 20 nM, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 nM, such as between at or about 1 nM and at or about 15 nM, e.g., between at or about 5 and at or about 10 nM. In some embodiments, the K D  of the IL-12 immunomodulatory polypeptide and the IL-12R is at or about or less than at or about 1 nM, 100 picomolar (pM), 90 pM, 80 pM, 70 pM, 60 pM, 50 pM, 40 pM, 30 pM, 25 pM, 20 pM, 15 pM, 10 pM, or 1 pM, such as between at or about 10 pM and at or about 100 pM, e.g., between at or about 25 pM and at or about 75 pM. 
     In some aspects, the increased activity and/or binding is greater than effected by a reference immunomodulatory polypeptide containing a polypeptide linker between subunits but not containing the targeting moiety. In some such aspects, the increase is by greater than 1.2-fold, greater than 1.5-fold, greater than 2.0-fold, greater than 3.0-fold, greater than 4.0-fold, greater than 5.0-fold or greater than 10.0-fold. 
     In some embodiments, the immunomodulatory protein contains: a p35 subunit that has the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:10; a joining region comprising a targeting moiety set forth in SEQ ID NO:13 (HBP BMP4); and a p40 subunit that has the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:11. The components can be in the order as specified or the reverse order. In some embodiments, the joining region contains the targeting moiety flanked on either side by a linker each independently set forth in SEQ ID NO:29, such as set forth in SEQ ID NO:7. In some embodiments, the immunomodulatory protein comprises the sequence of amino acids set forth in SEQ ID NO:2 or a sequence of amino acids that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:2. 
     In some embodiments, the immunomodulatory protein contains: a p35 subunit that has the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:10; a joining region comprising a targeting moiety set forth in SEQ ID NO:14 (HBP FBN); and a p40 subunit that has the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:11. The components can be in the order as specified or the reverse order. In some embodiments, the joining region contains the targeting moiety flanked on either side by a linker each independently set forth in SEQ ID NO:29, such as set forth in SEQ ID NO:7. In some embodiments, the immunomodulatory protein comprises the sequence of amino acids set forth in SEQ ID NO:3 or a sequence of amino acids that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:3. 
     In some embodiments, the immunomodulatory protein contains: a p35 subunit that has the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:10; a joining region comprising a targeting moiety set forth in SEQ ID NO:15 (HGF binding peptide); and a p40 subunit that has the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:11. The components can be in the order as specified or the reverse order. In some embodiments, the joining region contains the targeting moiety flanked on either side by a linker each independently set forth in SEQ ID NO:29, such as set forth in SEQ ID NO:7. In some embodiments, the immunomodulatory protein comprises the sequence of amino acids set forth in SEQ ID NO:4 or a sequence of amino acids that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:4. 
     In some embodiments, the immunomodulatory protein contains: a p35 subunit that has the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:10; a joining region comprising a targeting moiety set forth in SEQ ID NO:16 (EGFRBP); and a p40 subunit that has the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:11. The components can be in the order as specified or the reverse order. In some embodiments, the joining region contains the targeting moiety flanked on either side by a linker each independently set forth in SEQ ID NO:29, such as set forth in SEQ ID NO:7. In some embodiments, the immunomodulatory protein comprises the sequence of amino acids set forth in SEQ ID NO:5 or a sequence of amino acids that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:5. 
     In some embodiments, the immunomodulatory protein contains: a p35 subunit that has the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:10; a joining region comprising a targeting moiety that is an anti-EPCAM antibody comprising the VH chain set forth in SEQ ID NO:25 and/or the VL chain set forth in SEQ ID NO: 24, such as an scFv set forth in SEQ ID NO:17 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to any of SEQ ID NOS: 17, 24 and 25; and a p40 subunit that has the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:11. The components can be in the order as specified or the reverse order. In some embodiments, the joining region contains the targeting moiety flanked on either side by a linker each independently set forth in SEQ ID NO:29, such as set forth in SEQ ID NO:7. In some embodiments, the immunomodulatory protein comprises the sequence of amino acids set forth in SEQ ID NO:6 or a sequence of amino acids that has at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% sequence identity to SEQ ID NO:6. 
     II. RECOMBINANT RECEPTORS 
     In some embodiments, the immunomodulatory polypeptides are used in combination with and/or are expressed in or from engineered cells expressing recombinant receptors. 
     Thus, provided are engineered or recombinant receptors and cells expressing such receptors. In some embodiments, the engineered or recombinant receptors include chimeric receptors, including those containing ligand-binding domains or binding fragments thereof, such as functional non-TCR antigen receptors, such as chimeric antigen receptors (CARs), and also include T cell receptors (TCRs), such as transgenic TCRs, and components thereof. The chimeric receptor, such as a CAR, generally includes the extracellular antigen (or ligand) binding domain linked to one or more intracellular signaling components, in some aspects via linkers and/or transmembrane domain(s). 
     In particular embodiments, the recombinant receptor, such as chimeric receptor, contains an intracellular signaling domain, which includes an activating cytoplasmic signaling domain (also interchangeably called an intracellular signaling region), such as an activating cytoplasmic (intracellular) domain capable of inducing a primary activation signal in a T cell, for example, a cytoplasmic signaling domain of a T cell receptor (TCR) component (e.g. a cytoplasmic signaling domain of a zeta chain of a CD3-zeta (CD3) chain or a functional variant or signaling portion thereof) and/or that comprises an immunoreceptor tyrosine-based activation motif (ITAM). 
     In some embodiments, the chimeric receptor further contains an extracellular ligand-binding domain that specifically binds to a ligand (e.g. antigen) antigen. In some embodiments, the chimeric receptor is a CAR that contains an extracellular antigen-recognition domain that specifically binds to an antigen. In some embodiments, the ligand, such as an antigen, is a protein expressed on the surface of cells. In some embodiments, the CAR is a TCR-like CAR and the antigen is a processed peptide antigen, such as a peptide antigen of an intracellular protein, which, like a TCR, is recognized on the cell surface in the context of a major histocompatibility complex (MHC) molecule. 
     Exemplary recombinant receptors, including CARs and recombinant TCRs, as well as methods for engineering and introducing the receptors into cells, include those described, for example, in international patent application publication numbers WO200014257, WO2013126726, WO2012/129514, WO2014031687, WO2013/166321, WO2013/071154, WO2013/123061 U.S. patent application publication numbers US2002131960, US2013287748, US20130149337, U.S. Pat. Nos. 6,451,995, 7,446,190, 8,252,592, 8,339,645, 8,398,282, 7,446,179, 6,410,319, 7,070,995, 7,265,209, 7,354,762, 7,446,191, 8,324,353, and 8,479,118, and European patent application number EP2537416, and/or those described by Sadelain et al., Cancer Discov. 2013 April; 3(4): 388-398; Davila et al. (2013)  PLoS ONE  8(4): e61338; Turtle et al.,  Curr. Opin. Immunol.,  2012 October; 24(5): 633-39; Wu et al.,  Cancer,  2012 Mar. 18(2): 160-75. In some embodiments, the genetically engineered antigen receptors include a CAR as described in U.S. Pat. No. 7,446,190, and those described in International Patent Application Publication No.: WO/2014055668 A1. In some embodiments, similar methods for the construction and introduction or transfer into immune cells can be employed for the provided chimeric receptors. 
     In some embodiments, the recombinant receptor, such as a chimeric receptor (e.g. CAR), includes a ligand-binding domain that binds, such as specifically binds, to an antigen (or a ligand). Among the antigens targeted by the chimeric receptors are those expressed in the context of a disease, condition, or cell type to be targeted via the adoptive cell therapy. Among the diseases and conditions are proliferative, neoplastic, and malignant diseases and disorders, including cancers and tumors, including hematologic cancers, cancers of the immune system, such as lymphomas, leukemias, and/or myelomas, such as B, T, and myeloid leukemias, lymphomas, and multiple myelomas. 
     In some embodiments, the antigen (or a ligand) is a polypeptide. In some embodiments, it is a carbohydrate or other molecule. In some embodiments, the antigen (or a ligand) is selectively expressed or overexpressed on cells of the disease or condition, e.g., the tumor or pathogenic cells, as compared to normal or non-targeted cells or tissues. In other embodiments, the antigen is expressed on normal cells and/or is expressed on the engineered cells. 
     In some embodiments, the antigen (or a ligand) is a tumor antigen or cancer marker. 
     In certain embodiments, the antigen is αvβ6 integrin (avb6 integrin), B cell maturation antigen (BCMA), B7-H6, carbonic anhydrase 9 (CA9, also known as CAIX or G250), a cancer-testis antigen, cancer/testis antigen 1B (CTAG, also known as NY-ESO-1 and LAGE-2), carcinoembryonic antigen (CEA), a cyclin, cyclin A2, C-C Motif Chemokine Ligand 1 (CCL-1), CD19, CD20, CD22, CD23, CD24, CD30, CD33, CD38, CD44, CD44v6, CD44v7/8, CD123, CD138, CD171, epidermal growth factor protein (EGFR), truncated epidermal growth factor protein (tEGFR), type III epidermal growth factor receptor mutation (EGFR vIII), epithelial glycoprotein 2 (EPG-2), epithelial glycoprotein 40 (EPG-40), ephrinB2, ephrin receptor A2 (EPHa2), estrogen receptor, Fc receptor like 5 (FCRL5; also known as Fc receptor homolog 5 or FCRH5), fetal acetylcholine receptor (fetal AchR), a folate binding protein (FBP), folate receptor alpha, fetal acetylcholine receptor, ganglioside GD2, 0-acetylated GD2 (OGD2), ganglioside GD3, glycoprotein 100 (gp100), Her2/neu (receptor tyrosine kinase erbB2), Her3 (erb-B3), Her4 (erb-B4), erbB dimers, Human high molecular weight-melanoma-associated antigen (HMW-MAA), hepatitis B surface antigen, Human leukocyte antigen A1 (HLA-AI), Human leukocyte antigen A2 (HLA-A2), IL-22 receptor alpha(IL-22Ra), IL-13 receptor alpha 2 (IL-13Ra2), kinase insert domain receptor (kdr), kappa light chain, L1 cell adhesion molecule (L1CAM), CE7 epitope of L1-CAM, Leucine Rich Repeat Containing 8 Family Member A (LRRC8A), Lewis Y, Melanoma-associated antigen (MAGE)-A1, MAGE-A3, MAGE-A6, mesothelin, c-Met, murine cytomegalovirus (CMV), mucin 1 (MUC1), MUC16, natural killer group 2 member D (NKG2D) ligands, melan A (MART-1), neural cell adhesion molecule (NCAM), oncofetal antigen, Preferentially expressed antigen of melanoma (PRAME), progesterone receptor, a prostate specific antigen, prostate stem cell antigen (PSCA), prostate specific membrane antigen (PSMA), Receptor Tyrosine Kinase Like Orphan Receptor 1 (ROR1), survivin, Trophoblast glycoprotein (TPBG also known as 5T4), tumor-associated glycoprotein 72 (TAG72), vascular endothelial growth factor receptor (VEGFR), vascular endothelial growth factor receptor 2 (VEGFR2), Wilms Tumor 1 (WT-1), a pathogen-specific antigen, or an antigen associated with a universal tag, and/or biotinylated molecules, and/or molecules expressed by HIV, HCV, HBV or other pathogens. Antigens targeted by the receptors in some embodiments include antigens associated with a B cell malignancy, such as any of a number of known B cell marker. In some embodiments, the antigen targeted by the receptor is CD20, CD19, CD22, ROR1, CD45, CD21, CD5, CD33, Igkappa, Iglambda, CD79a, CD79b or CD30. 
     In some embodiments, the antigen is a pathogen-specific antigen. In some embodiments, the antigen is a viral antigen (such as a viral antigen from HIV, HCV, HBV, etc.), bacterial antigens, and/or parasitic antigens. 
     A. Ligand Binding Domain 
     In some embodiments, the recombinant receptor, e.g. antigen receptor, contains a ligand-binding domain, such as an antigen-binding domain. In some embodiments, the recombinant receptor is a chimeric antigen receptor (CAR). 
     In some embodiments, the CAR is constructed with a specificity for a particular antigen (or marker or ligand), such as an antigen expressed in a particular cell type to be targeted by adoptive therapy, e.g., a cancer marker, and/or an antigen intended to induce a dampening response, such as an antigen expressed on a normal or non-diseased cell type. Thus, the CAR typically includes in its extracellular portion one or more antigen binding molecules, such as one or more antigen-binding fragment, domain, or portion, or one or more antibody variable domains, and/or antibody molecules. In some embodiments, the CAR includes an antigen-binding portion or portions of an antibody molecule, such as a single-chain antibody fragment (scFv) derived from the variable heavy (VH) and variable light (VL) chains of a monoclonal antibody (mAb). 
     The term “antibody” herein is used in the broadest sense and includes polyclonal and monoclonal antibodies, including intact antibodies and functional (antigen-binding) antibody fragments, including fragment antigen binding (Fab) fragments, F(ab′) 2  fragments, Fab′ fragments, Fv fragments, recombinant IgG (rIgG) fragments, variable heavy chain (V H ) regions capable of specifically binding the antigen, single chain antibody fragments, including single chain variable fragments (scFv), and single domain antibodies (e.g., sdAb, sdFv, nanobody) fragments. The term encompasses genetically engineered and/or otherwise modified forms of immunoglobulins, such as intrabodies, peptibodies, chimeric antibodies, fully human antibodies, humanized antibodies, and heteroconjugate antibodies, multispecific, e.g., bispecific, antibodies, diabodies, triabodies, and tetrabodies, tandem di-scFv, tandem tri-scFv. Unless otherwise stated, the term “antibody” should be understood to encompass functional antibody fragments thereof. The term also encompasses intact or full-length antibodies, including antibodies of any class or sub-class, including IgG and sub-classes thereof, IgM, IgE, IgA, and IgD. 
     In some embodiments, the antigen-binding proteins, antibodies and antigen binding fragments thereof specifically recognize an antigen of a full-length antibody. In some embodiments, the heavy and light chains of an antibody can be full-length or can be an antigen-binding portion (a Fab, F(ab′)2, Fv or a single chain Fv fragment (scFv)). In other embodiments, the antibody heavy chain constant region is chosen from, e.g., IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgD, and IgE, particularly chosen from, e.g., IgG1, IgG2, IgG3, and IgG4, more particularly, IgG1 (e.g., human IgG1). In another embodiment, the antibody light chain constant region is chosen from, e.g., kappa or lambda, particularly kappa. 
     Among the provided antibodies are antibody fragments. An “antibody fragment” refers to a molecule other than an intact antibody that comprises a portion of an intact antibody that binds the antigen to which the intact antibody binds. Examples of antibody fragments include but are not limited to Fv, Fab, Fab′, Fab′-SH, F(ab′) 2 ; diabodies; linear antibodies; variable heavy chain (V H ) regions, single-chain antibody molecules such as scFvs and single-domain V H  single antibodies; and multispecific antibodies formed from antibody fragments. In particular embodiments, the antibodies are single-chain antibody fragments comprising a variable heavy chain region and/or a variable light chain region, such as scFvs. 
     The term “variable region” or “variable domain” refers to the domain of an antibody heavy or light chain that is involved in binding the antibody to antigen. The variable domains of the heavy chain and light chain (V H  and V L , respectively) of a native antibody generally have similar structures, with each domain comprising four conserved framework regions (FRs) and three CDRs. (See, e.g., Kindt et al. Kuby Immunology, 6th ed., W.H. Freeman and Co., page 91 (2007). A single V H  or V L  domain may be sufficient to confer antigen-binding specificity. Furthermore, antibodies that bind a particular antigen may be isolated using a V H  or V L  domain from an antibody that binds the antigen to screen a library of complementary V L  or V H  domains, respectively. See, e.g., Portolano et al., J. Immunol. 150:880-887 (1993); Clarkson et al., Nature 352:624-628 (1991). 
     Single-domain antibodies are antibody fragments comprising all or a portion of the heavy chain variable domain or all or a portion of the light chain variable domain of an antibody. In certain embodiments, a single-domain antibody is a human single-domain antibody. In some embodiments, the CAR comprises an antibody heavy chain domain that specifically binds the antigen, such as a cancer marker or cell surface antigen of a cell or disease to be targeted, such as a tumor cell or a cancer cell, such as any of the target antigens described herein or known in the art. 
     Antibody fragments can be made by various techniques, including but not limited to proteolytic digestion of an intact antibody as well as production by recombinant host cells. In some embodiments, the antibodies are recombinantly-produced fragments, such as fragments comprising arrangements that do not occur naturally, such as those with two or more antibody regions or chains joined by synthetic linkers, e.g., peptide linkers, and/or that are may not be produced by enzyme digestion of a naturally-occurring intact antibody. In some embodiments, the antibody fragments are scFvs. 
     A “humanized” antibody is an antibody in which all or substantially all CDR amino acid residues are derived from non-human CDRs and all or substantially all FR amino acid residues are derived from human FRs. A humanized antibody optionally may include at least a portion of an antibody constant region derived from a human antibody. A “humanized form” of a non-human antibody, refers to a variant of the non-human antibody that has undergone humanization, typically to reduce immunogenicity to humans, while retaining the specificity and affinity of the parental non-human antibody. In some embodiments, some FR residues in a humanized antibody are substituted with corresponding residues from a non-human antibody (e.g., the antibody from which the CDR residues are derived), e.g., to restore or improve antibody specificity or affinity. 
     In some embodiments, the CAR contains an antibody or an antigen-binding fragment (e.g. scFv) that specifically recognizes an antigen, such as an intact antigen, expressed on the surface of a cell. 
     In some embodiments, the CAR contains a TCR-like antibody, such as an antibody or an antigen-binding fragment (e.g. scFv) that specifically recognizes an intracellular antigen, such as a tumor-associated antigen, presented on the cell surface as a MHC-peptide complex. In some embodiments, an antibody or antigen-binding portion thereof that recognizes an MHC-peptide complex can be expressed on cells as part of a recombinant receptor, such as an antigen receptor. Among the antigen receptors are functional non-TCR antigen receptors, such as chimeric antigen receptors (CARs). Generally, a CAR containing an antibody or antigen-binding fragment that exhibits TCR-like specificity directed against peptide-MHC complexes also may be referred to as a TCR-like CAR. 
     Reference to “Major histocompatibility complex” (MHC) refers to a protein, generally a glycoprotein, that contains a polymorphic peptide binding site or binding groove that can, in some cases, complex with peptide antigens of polypeptides, including peptide antigens processed by the cell machinery. In some cases, MHC molecules can be displayed or expressed on the cell surface, including as a complex with peptide, i.e. MHC-peptide complex, for presentation of an antigen in a conformation recognizable by an antigen receptor on T cells, such as a TCRs or TCR-like antibody. Generally, MHC class I molecules are heterodimers having a membrane spanning α chain, in some cases with three a domains, and a non-covalently associated β2 microglobulin. Generally, MHC class II molecules are composed of two transmembrane glycoproteins, α and β, both of which typically span the membrane. An MHC molecule can include an effective portion of an MHC that contains an antigen binding site or sites for binding a peptide and the sequences necessary for recognition by the appropriate antigen receptor. In some embodiments, MHC class I molecules deliver peptides originating in the cytosol to the cell surface, where a MHC-peptide complex is recognized by T cells, such as generally CD8 +  T cells, but in some cases CD4+ T cells. In some embodiments, MHC class II molecules deliver peptides originating in the vesicular system to the cell surface, where they are typically recognized by CD4 +  T cells. Generally, MHC molecules are encoded by a group of linked loci, which are collectively termed H-2 in the mouse and human leukocyte antigen (HLA) in humans. Hence, typically human MHC can also be referred to as human leukocyte antigen (HLA). 
     The term “MHC-peptide complex” or “peptide-MHC complex” or variations thereof, refers to a complex or association of a peptide antigen and an MHC molecule, such as, generally, by non-covalent interactions of the peptide in the binding groove or cleft of the MHC molecule. In some embodiments, the MHC-peptide complex is present or displayed on the surface of cells. In some embodiments, the MHC-peptide complex can be specifically recognized by an antigen receptor, such as a TCR, TCR-like CAR or antigen-binding portions thereof. 
     In some embodiments, a peptide, such as a peptide antigen or epitope, of a polypeptide can associate with an MHC molecule, such as for recognition by an antigen receptor. Generally, the peptide is derived from or based on a fragment of a longer biological molecule, such as a polypeptide or protein. In some embodiments, the peptide typically is about 8 to about 24 amino acids in length. In some embodiments, a peptide has a length of from or from about 9 to 22 amino acids for recognition in the MHC Class II complex. In some embodiments, a peptide has a length of from or from about 8 to 13 amino acids for recognition in the MHC Class I complex. In some embodiments, upon recognition of the peptide in the context of an MHC molecule, such as MHC-peptide complex, the antigen receptor, such as TCR or TCR-like CAR, produces or triggers an activation signal to the T cell that induces a T cell response, such as T cell proliferation, cytokine production, a cytotoxic T cell response or other response. 
     In some embodiments, an antibody or antigen-binding portion thereof that specifically binds to a MHC-peptide complex, can be produced by immunizing a host with an effective amount of an immunogen containing a specific MHC-peptide complex. In some cases, the peptide of the MHC-peptide complex is an epitope of antigen capable of binding to the MHC, such as a tumor antigen, for example a universal tumor antigen, myeloma antigen or other antigen as described below. In some embodiments, an effective amount of the immunogen is then administered to a host for eliciting an immune response, wherein the immunogen retains a three-dimensional form thereof for a period of time sufficient to elicit an immune response against the three-dimensional presentation of the peptide in the binding groove of the MHC molecule. Serum collected from the host is then assayed to determine if desired antibodies that recognize a three-dimensional presentation of the peptide in the binding groove of the MHC molecule is being produced. In some embodiments, the produced antibodies can be assessed to confirm that the antibody can differentiate the MHC-peptide complex from the MHC molecule alone, the peptide of interest alone, and a complex of MHC and irrelevant peptide. The desired antibodies can then be isolated. 
     In some embodiments, an antibody or antigen-binding portion thereof that specifically binds to an MHC-peptide complex can be produced by employing antibody library display methods, such as phage antibody libraries. In some embodiments, phage display libraries of mutant Fab, scFV or other antibody forms can be generated, for example, in which members of the library are mutated at one or more residues of a CDR or CDRs. Exemplary of such methods are known in the art (see e.g. US published application No. US20020150914, US2014/0294841; and Cohen C J. et al. (2003)  J Mol. Recogn.  16:324-332). 
     1. T cell Receptors (TCRs) 
     In some embodiments, the recombinant receptors include recombinant T cell receptors (TCRs) and/or TCRs cloned from naturally occurring T cells. 
     In some embodiments, a T cell receptor (TCR) contains a variable α and β chains (also known as TCRα and TCRβ, respectively) or a variable γ and δ chains (also known as TCRγ and TCRδ, respectively), or a functional fragment thereof such that the molecule is capable of specifically binding to an antigen peptide bound to a MHC receptor. In some embodiments, the TCR is in the αβ form. Typically, TCRs that exist in αβ and γδ forms are generally structurally similar, but T cells expressing them may have distinct anatomical locations or functions. A TCR can be found on the surface of a cell or in soluble form. Generally, a TCR is found on the surface of T cells (or T lymphocytes) where it is generally responsible for recognizing antigens bound to major histocompatibility complex (MHC) molecules. In some embodiments, a TCR also can contain a constant domain, a transmembrane domain and/or a short cytoplasmic tail (see, e.g., Janeway et al.,  Immunobiology: The Immune System in Health and Disease,  3 rd  Ed., Current Biology Publications, p. 4:33, 1997). For example, in some embodiments, each chain of the TCR can possess one N-terminal immunoglobulin variable domain, one immunoglobulin constant domain, a transmembrane region, and a short cytoplasmic tail at the C-terminal end. In some embodiments, a TCR is associated with invariant proteins of the CD3 complex involved in mediating signal transduction. 
     Unless otherwise stated, the term “TCR” should be understood to encompass functional TCR fragments thereof. The term also encompasses intact or full-length TCRs, including TCRs in the αβ form or γδ form. Thus, for purposes herein, reference to a TCR includes any TCR or functional fragment, such as an antigen-binding portion of a TCR that binds to a specific antigenic peptide bound in an MHC molecule, i.e. MHC-peptide complex. An “antigen-binding portion” or antigen-binding fragment” of a TCR, which can be used interchangeably, refers to a molecule that contains a portion of the structural domains of a TCR, but that binds the antigen (e.g. MHC-peptide complex) to which the full TCR binds. In some cases, an antigen-binding portion contains the variable domains of a TCR, such as variable α chain and variable β chain of a TCR, sufficient to form a binding site for binding to a specific MHC-peptide complex, such as generally where each chain contains three complementarity determining regions. 
     In some embodiments, the variable domains of the TCR chains associate to form loops, or complementarity determining regions (CDRs) analogous to immunoglobulins, which confer antigen recognition and determine peptide specificity by forming the binding site of the TCR molecule and determine peptide specificity. Typically, like immunoglobulins, the CDRs are separated by framework regions (FRs) (see, e.g., Jores et al.,  Proc. Nat&#39;l Acad. Sci. U.S.A.  87:9138, 1990; Chothia et al., EMBO J. 7:3745, 1988; see also Lefranc et al.,  Dev. Comp. Immunol.  27:55, 2003). In some embodiments, CDR3 is the main CDR responsible for recognizing processed antigen, although CDR1 of the alpha chain has also been shown to interact with the N-terminal part of the antigenic peptide, whereas CDR1 of the beta chain interacts with the C-terminal part of the peptide. CDR2 is thought to recognize the MHC molecule. In some embodiments, the variable region of the β-chain can contain a further hypervariability (HV4) region. 
     In some embodiments, the TCR chains contain a constant domain. For example, like immunoglobulins, the extracellular portion of TCR chains (e.g., α-chain, β-chain) can contain two immunoglobulin domains, a variable domain (e.g., V α  or V β ; typically amino acids 1 to 116 based on Kabat numbering Kabat et al., “Sequences of Proteins of Immunological Interest, US Dept. Health and Human Services, Public Health Service National Institutes of Health, 1991, 5 th  ed.) at the N-terminus, and one constant domain (e.g., α-chain constant domain or C α , typically amino acids 117 to 259 based on Kabat, β-chain constant domain or C β , typically amino acids 117 to 295 based on Kabat) adjacent to the cell membrane. For example, in some cases, the extracellular portion of the TCR formed by the two chains contains two membrane-proximal constant domains, and two membrane-distal variable domains containing CDRs. The constant domain of the TCR domain contains short connecting sequences in which a cysteine residue forms a disulfide bond, making a link between the two chains. In some embodiments, a TCR may have an additional cysteine residue in each of the α and β chains such that the TCR contains two disulfide bonds in the constant domains. 
     In some embodiments, the TCR chains can contain a transmembrane domain. In some embodiments, the transmembrane domain is positively charged. In some cases, the TCR chain contains a cytoplasmic tail. In some cases, the structure allows the TCR to associate with other molecules like CD3. For example, a TCR containing constant domains with a transmembrane region can anchor the protein in the cell membrane and associate with invariant subunits of the CD3 signaling apparatus or complex. 
     Generally, CD3 is a multi-protein complex that can possess three distinct chains (γ, δ, and ε) in mammals and the ζ-chain. For example, in mammals the complex can contain a CD3γ chain, a CD3δ chain, two CD3ε chains, and a homodimer of CD3ζ chains. The CD3γ, CD3δ, and CD3ε chains are highly related cell surface proteins of the immunoglobulin superfamily containing a single immunoglobulin domain. The transmembrane regions of the CD3γ, CD3δ, and CD3ε chains are negatively charged, which is a characteristic that allows these chains to associate with the positively charged T cell receptor chains. The intracellular tails of the CD3γ, CD3δ, and CD3ε chains each contain a single conserved motif known as an immunoreceptor tyrosine-based activation motif or ITAM, whereas each CD3ζ chain has three. Generally, ITAMs are involved in the signaling capacity of the TCR complex. These accessory molecules have negatively charged transmembrane regions and play a role in propagating the signal from the TCR into the cell. The CD3- and ζ-chains, together with the TCR, form what is known as the T cell receptor complex. 
     In some embodiments, the TCR may be a heterodimer of two chains α and β (or optionally γ and δ) or it may be a single chain TCR construct. In some embodiments, the TCR is a heterodimer containing two separate chains (α and β chains or γ and δ chains) that are linked, such as by a disulfide bond or disulfide bonds. 
     In some embodiments, a TCR for a target antigen (e.g., a cancer antigen) is identified and introduced into the cells. In some embodiments, nucleic acid encoding the TCR can be obtained from a variety of sources, such as by polymerase chain reaction (PCR) amplification of publicly available TCR DNA sequences. In some embodiments, the TCR is obtained from a biological source, such as from cells such as from a T cell (e.g. cytotoxic T cell), T-cell hybridomas or other publicly available source. In some embodiments, the T-cells can be obtained from in vivo isolated cells. In some embodiments, a high-affinity T cell clone can be isolated from a patient and the TCR isolated. In some embodiments, the T-cells can be a cultured T-cell hybridoma or clone. In some embodiments, the TCR clone for a target antigen has been generated in transgenic mice engineered with human immune system genes (e.g., the human leukocyte antigen system, or HLA). See, e.g., tumor antigens (see, e.g., Parkhurst et al. (2009)  Clin Cancer Res.  15:169-180 and Cohen et al. (2005)  J Immunol.  175:5799-5808. In some embodiments, phage display is used to isolate TCRs against a target antigen (see, e.g., Varela-Rohena et al. (2008)  Nat Med.  14:1390-1395 and Li (2005)  Nat Biotechnol.  23:349-354. In some embodiments, the TCR or antigen-binding portion thereof can be synthetically generated from knowledge of the sequence of the TCR. 
     In some embodiments, after the T-cell clone is obtained, the TCR alpha and beta chains are isolated and cloned into a gene expression vector. In some embodiments, the TCR alpha and beta genes are linked via a picornavirus 2A ribosomal skip peptide so that both chains are coexpressed. In some embodiments, genetic transfer of the TCR is accomplished via retroviral or lentiviral vectors, or via transposons (see, e.g., Baum et al. (2006) Molecular Therapy: The Journal of the American Society of Gene Therapy. 13:1050-1063; Frecha et al. (2010) Molecular Therapy: The Journal of the American Society of Gene Therapy. 18:1748-1757; an Hackett et al. (2010) Molecular Therapy: The Journal of the American Society of Gene Therapy. 18:674-683. 
     B. Transmembrane and Intracellular Domains 
     In some embodiments, the recombinant receptor such as the CAR, such as the antibody portion thereof, further includes a spacer, which may be or include at least a portion of an immunoglobulin constant region or variant or modified version thereof, such as a hinge region, e.g., an IgG4 hinge region, and/or a CH1/CL and/or Fc region. In some embodiments, the constant region or portion is of a human IgG, such as IgG4 or IgG1. In some aspects, the portion of the constant region serves as a spacer region between the antigen-recognition component, e.g., scFv, and transmembrane domain. The spacer can be of a length that provides for increased responsiveness of the cell following antigen binding, as compared to in the absence of the spacer. In some examples, the spacer is at or about 12 amino acids in length or is no more than 12 amino acids in length. Exemplary spacers include those having at least about 10 to 229 amino acids, about 10 to 200 amino acids, about 10 to 175 amino acids, about 10 to 150 amino acids, about 10 to 125 amino acids, about 10 to 100 amino acids, about 10 to 75 amino acids, about 10 to 50 amino acids, about 10 to 40 amino acids, about 10 to 30 amino acids, about 10 to 20 amino acids, or about 10 to 15 amino acids, and including any integer between the endpoints of any of the listed ranges. In some embodiments, a spacer region has about 12 amino acids or less, about 119 amino acids or less, or about 229 amino acids or less. Exemplary spacers include IgG4 hinge alone, IgG4 hinge linked to CH2 and CH3 domains, or IgG4 hinge linked to the CH3 domain. Exemplary spacers include, but are not limited to, those described in Hudecek et al. (2013)  Clin. Cancer Res.,  19:3153 or international patent application publication number WO2014031687. In some embodiments, the spacer has the sequence set forth in SEQ ID NO: 70, and is encoded by the sequence set forth in SEQ ID NO: 71. In some embodiments, the spacer has the sequence set forth in SEQ ID NO: 72. In some embodiments, the spacer has the sequence set forth in SEQ ID NO: 73. 
     In some embodiments, the constant region or portion is of IgD. In some embodiments, the spacer has the sequence set forth in SEQ ID NO:74. In some embodiments, the spacer has a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to any of SEQ ID NOS: 70, 72, 73 and 74. 
     The antigen recognition domain generally is linked to one or more intracellular signaling components, such as signaling components that mimic activation through an antigen receptor complex, such as a TCR complex, in the case of a CAR, and/or signal via another cell surface receptor. Thus, in some embodiments, the antigen binding component (e.g., antibody) is linked to one or more transmembrane and intracellular signaling domains. In some embodiments, the transmembrane domain is fused to the extracellular domain. In one embodiment, a transmembrane domain that naturally is associated with one of the domains in the receptor, e.g., CAR, is used. In some instances, the transmembrane domain is selected or modified by amino acid substitution to avoid binding of such domains to the transmembrane domains of the same or different surface membrane proteins to minimize interactions with other members of the receptor complex. 
     The transmembrane domain in some embodiments is derived either from a natural or from a synthetic source. Where the source is natural, the domain in some aspects is derived from any membrane-bound or transmembrane protein. Transmembrane regions include those derived from (i.e. comprise at least the transmembrane region(s) of) the alpha, beta or zeta chain of the T-cell receptor, CD28, CD3 epsilon, CD45, CD4, CD5, CD8, CD9, CD 16, CD22, CD33, CD37, CD64, CD80, CD86, CD 134, CD137, CD 154. Alternatively the transmembrane domain in some embodiments is synthetic. In some aspects, the synthetic transmembrane domain comprises predominantly hydrophobic residues such as leucine and valine. In some aspects, a triplet of phenylalanine, tryptophan and valine will be found at each end of a synthetic transmembrane domain. In some embodiments, the linkage is by linkers, spacers, and/or transmembrane domain(s). 
     Among the intracellular signaling domains are those that mimic or approximate a signal through a natural antigen receptor, a signal through such a receptor in combination with a costimulatory receptor, and/or a signal through a costimulatory receptor alone. In some embodiments, a short oligo- or polypeptide linker, for example, a linker of between 2 and 10 amino acids in length, such as one containing glycines and serines, e.g., glycine-serine doublet, is present and forms a linkage between the transmembrane domain and the cytoplasmic signaling domain of the CAR. 
     The receptor, e.g., the CAR, generally includes at least one intracellular signaling component or components. In some embodiments, the receptor includes an intracellular component of a TCR complex, such as a TCR CD3 chain that mediates T-cell activation and cytotoxicity, e.g., CD3 zeta chain. Thus, in some aspects, the CAR is linked to one or more cell signaling modules. In some embodiments, cell signaling modules include CD3 transmembrane domain, CD3 intracellular signaling domains, and/or other CD transmembrane domains. In some embodiments, the receptor, e.g., CAR, further includes a portion of one or more additional molecules such as Fc receptor γ, CD8, CD4, CD25, or CD16. For example, in some aspects, the CAR includes a chimeric molecule between CD3-zeta (CD3-ζ) or Fc receptor γ and CD8, CD4, CD25 or CD16. 
     In some embodiments, upon ligation of the CAR, the cytoplasmic domain or intracellular signaling domain of the CAR activates at least one of the normal effector functions or responses of the immune cell, e.g., T cell engineered to express the CAR. For example, in some contexts, the CAR induces a function of a T cell such as cytolytic activity or T-helper activity, such as secretion of cytokines or other factors. In some embodiments, a truncated portion of an intracellular signaling domain of an antigen receptor component or costimulatory molecule is used in place of an intact immunostimulatory chain, for example, if it transduces the effector function signal. In some embodiments, the intracellular signaling domain or domains include the cytoplasmic sequences of the T cell receptor (TCR), and in some aspects also those of co-receptors that in the natural context act in concert with such receptor to initiate signal transduction following antigen receptor engagement, and/or any derivative or variant of such molecules, and/or any synthetic sequence that has the same functional capability. 
     In the context of a natural TCR, full activation generally requires not only signaling through the TCR, but also a costimulatory signal. Thus, in some embodiments, to promote full activation, a component for generating secondary or co-stimulatory signal is also included in the CAR. In other embodiments, the CAR does not include a component for generating a costimulatory signal. In some aspects, an additional CAR is expressed in the same cell and provides the component for generating the secondary or costimulatory signal. 
     T cell activation is in some aspects described as being mediated by two classes of cytoplasmic signaling sequences: those that initiate antigen-dependent primary activation through the TCR (primary cytoplasmic signaling sequences), and those that act in an antigen-independent manner to provide a secondary or co-stimulatory signal (secondary cytoplasmic signaling sequences). In some aspects, the CAR includes one or both of such signaling components. 
     In some aspects, the CAR includes a primary cytoplasmic signaling sequence that regulates primary activation of the TCR complex. Primary cytoplasmic signaling sequences that act in a stimulatory manner may contain signaling motifs which are known as immunoreceptor tyrosine-based activation motifs or ITAMs. Examples of ITAM containing primary cytoplasmic signaling sequences include those derived from TCR or CD3 zeta, FcR gamma or FcR beta. In some embodiments, cytoplasmic signaling molecule(s) in the CAR contain(s) a cytoplasmic signaling domain, portion thereof, or sequence derived from CD3 zeta. 
     In some embodiments, the CAR includes a signaling domain and/or transmembrane portion of a costimulatory receptor, such as CD28, 4-1BB, OX40, DAP10, and ICOS. In some aspects, the same CAR includes both the activating and costimulatory components. 
     In some embodiments, the activating domain is included within one CAR, whereas the costimulatory component is provided by another CAR recognizing another antigen. In some embodiments, the CARs include activating or stimulatory CARs, and costimulatory CARs, both expressed on the same cell (see WO2014/055668). 
     In certain embodiments, the intracellular signaling domain comprises a CD28 transmembrane and signaling domain linked to a CD3 (e.g., CD3-zeta) intracellular domain. In some embodiments, the intracellular signaling domain comprises a chimeric CD28 and CD137 (4-1BB, TNFRSF9) co-stimulatory domains, linked to a CD3 zeta intracellular domain. 
     In some embodiments, the CAR encompasses one or more, e.g., two or more, costimulatory domains and an activation domain, e.g., primary activation domain, in the cytoplasmic portion. Exemplary CARs include intracellular components of CD3-zeta, CD28, and 4-1BB. 
     In some embodiments, the CAR or other antigen receptor may further include a marker or the cell may further express a marker, such as a surrogate marker, which may be used to confirm transduction or engineering of the cell to express the receptor, such as a truncated version of a cell surface receptor, such as truncated EGFR (tEGFR). In some aspects, the marker includes all or part (e.g., truncated form) of CD34, a NGFR, or epidermal growth factor receptor (e.g., tEGFR). In some embodiments, the nucleic acid encoding the marker is operably linked to a polynucleotide encoding for a linker sequence, such as a cleavable linker sequence, e.g., T2A. See WO2014031687. In some embodiments, introduction of a construct encoding the CAR and EGFRt separated by a T2A ribosome switch can express two proteins from the same construct, such that the EGFRt can be used as a marker to detect cells expressing such construct. In some embodiments, a marker, and optionally a linker sequence, can be any as disclosed in published patent application No. WO2014031687. For example, the marker can be a truncated EGFR (tEGFR) that is, optionally, linked to a linker sequence, such as a T2A cleavable linker sequence. An exemplary polypeptide for a truncated EGFR (e.g. tEGFR) comprises the sequence of amino acids set forth in SEQ ID NO: 75 or 101 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO: 75 or 101. An exemplary T2A linker sequence comprises the sequence of amino acids set forth in SEQ ID NO: 76 or 96 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO: 76 or 96. 
     In some embodiments, the marker is a molecule, e.g., cell surface protein, not naturally found on T cells or not naturally found on the surface of T cells, or a portion thereof. 
     In some embodiments, the molecule is a non-self molecule, e.g., non-self protein, i.e., one that is not recognized as “self” by the immune system of the host into which the cells will be adoptively transferred. 
     In some embodiments, the marker serves no therapeutic function and/or produces no effect other than to be used as a marker for genetic engineering, e.g., for selecting cells successfully engineered. In other embodiments, the marker may be a therapeutic molecule or molecule otherwise exerting some desired effect, such as a ligand for a cell to be encountered in vivo, such as a costimulatory or immune checkpoint molecule to enhance and/or dampen responses of the cells upon adoptive transfer and encounter with ligand. 
     In some cases, CARs are referred to as first, second, and/or third generation CARs. In some aspects, a first generation CAR is one that solely provides a CD3-chain induced signal upon antigen binding; in some aspects, a second-generation CARs is one that provides such a signal and costimulatory signal, such as one including an intracellular signaling domain from a costimulatory receptor such as CD28 or CD137; in some aspects, a third generation CAR in some aspects is one that includes multiple costimulatory domains of different costimulatory receptors. 
     In some embodiments, the chimeric antigen receptor includes an extracellular portion containing the antibody or fragment described herein. In some aspects, the chimeric antigen receptor includes an extracellular portion containing the antibody or fragment described herein and an intracellular signaling domain. In some embodiments, the antibody or fragment includes an scFv or a single-domain V H  antibody and the intracellular domain contains an ITAM. In some aspects, the intracellular signaling domain includes a signaling domain of a zeta chain of a CD3-zeta (CD3ζ) chain. In some embodiments, the chimeric antigen receptor includes a transmembrane domain linking the extracellular domain and the intracellular signaling domain. 
     In some aspects, the transmembrane domain contains a transmembrane portion of CD28. The extracellular domain and transmembrane can be linked directly or indirectly. In some embodiments, the extracellular domain and transmembrane are linked by a spacer, such as any described herein. In some embodiments, the chimeric antigen receptor contains an intracellular domain of a T cell costimulatory molecule, such as between the transmembrane domain and intracellular signaling domain. In some aspects, the T cell costimulatory molecule is CD28 or 4-1BB. 
     In some embodiments, the CAR contains an antibody, e.g., an antibody fragment, a transmembrane domain that is or contains a transmembrane portion of CD28 or a functional variant thereof, and an intracellular signaling domain containing a signaling portion of CD28 or functional variant thereof and a signaling portion of CD3 zeta or functional variant thereof. In some embodiments, the CAR contains an antibody, e.g., antibody fragment, a transmembrane domain that is or contains a transmembrane portion of CD28 or a functional variant thereof, and an intracellular signaling domain containing a signaling portion of a 4-1BB or functional variant thereof and a signaling portion of CD3 zeta or functional variant thereof. In some such embodiments, the receptor further includes a spacer containing a portion of an Ig molecule, such as a human Ig molecule, such as an Ig hinge, e.g. an IgG4 hinge, such as a hinge-only spacer. 
     In some embodiments, the transmembrane domain of the receptor, e.g., the CAR is a transmembrane domain of human CD28 or variant thereof, e.g., a 27-amino acid transmembrane domain of a human CD28 (Accession No.: P10747.1), or is a transmembrane domain that comprises the sequence of amino acids set forth in SEQ ID NO: 77 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO:77; in some embodiments, the transmembrane-domain containing portion of the recombinant receptor comprises the sequence of amino acids set forth in SEQ ID NO: 78 or a sequence of amino acids having at least at or about 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity thereto. 
     In some embodiments, the chimeric antigen receptor contains an intracellular domain of a T cell costimulatory molecule. In some aspects, the T cell costimulatory molecule is CD28 or 4-1BB. 
     In some embodiments, the intracellular signaling domain comprises an intracellular costimulatory signaling domain of human CD28 or functional variant or portion thereof, such as a 41 amino acid domain thereof and/or such a domain with an LL to GG substitution at positions 186-187 of a native CD28 protein. In some embodiments, the intracellular signaling domain can comprise the sequence of amino acids set forth in SEQ ID NO: 79 or 80 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO: 79 or 80. In some embodiments, the intracellular domain comprises an intracellular costimulatory signaling domain of 4-1BB or functional variant or portion thereof, such as a 42-amino acid cytoplasmic domain of a human 4-1BB (Accession No. Q07011.1) or functional variant or portion thereof, such as the sequence of amino acids set forth in SEQ ID NO: 81 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO: 81. 
     In some embodiments, the intracellular signaling domain comprises a human CD3 zeta stimulatory signaling domain or functional variant thereof, such as a 112 AA cytoplasmic domain of isoform 3 of human CD3ζ (Accession No.: P20963.2) or a CD3 zeta signaling domain as described in U.S. Pat. No. 7,446,190 or 8,911,993. In some embodiments, the intracellular signaling domain comprises the sequence of amino acids set forth in SEQ ID NO: 82, 83 or 84 or a sequence of amino acids that exhibits at least 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or more sequence identity to SEQ ID NO: 82, 83 or 84. 
     In some aspects, the spacer contains only a hinge region of an IgG, such as only a hinge of IgG4 or IgG1, such as the hinge only spacer set forth in SEQ ID NO:70. In other embodiments, the spacer is an Ig hinge, e.g., and IgG4 hinge, linked to a CH2 and/or CH3 domains. In some embodiments, the spacer is an Ig hinge, e.g., an IgG4 hinge, linked to CH2 and CH3 domains, such as set forth in SEQ ID NO:73. In some embodiments, the spacer is an Ig hinge, e.g., an IgG4 hinge, linked to a CH3 domain only, such as set forth in SEQ ID NO:72. In some embodiments, the spacer is or comprises a glycine-serine rich sequence or other flexible linker such as known flexible linkers. 
     For example, in some embodiments, the CAR includes an antigen-binding domain, e.g. scFvs, a spacer such as any of the Ig-hinge containing spacers, a CD28 transmembrane domain, a CD28 intracellular signaling domain, and a CD3 zeta signaling domain. In some embodiments, the CAR includes the antigen-binding domain, e.g. scFv, a spacer such as any of the Ig-hinge containing spacers, a CD28 transmembrane domain, a CD28 intracellular signaling domain, and a CD3 zeta signaling domain. In some embodiments, such CAR constructs further includes a T2A ribosomal skip element and/or a tEGFR sequence, e.g., downstream of the CAR. 
     III. NUCLEIC ACIDS, VECTORS, AND ENGINEERED CELLS 
     Also provided are polynucleotides (nucleic acid molecules) encoding the immunomodulatory peptides and recombinant receptors, vectors for genetically engineering cells to express such polypeptides and receptors, and methods for producing the immunomodulatory polypeptides, recombinant receptors, and genetically engineered cells. 
     A. Polynucleotides 
     In some embodiments, provided are polynucleotides that encode any of the immunomodulatory polypeptides provided herein. In some aspects, the polynucleotide contains a signal nucleic acid sequence, such as a nucleic acid sequence encoding the immunomodulatory polypeptide. In other instances, the polynucleotide contains a first nucleic acid sequence encoding the immunomodulatory polypeptide and a second nucleic acid sequence encoding a recombinant receptor. In some aspects, the recombinant receptor is or contains a chimeric antigen receptor (CAR). In some aspects, the recombinant receptor is or contains a T cell receptor (TCR), e.g., a transgenic TCR. 
     Any of the provided polynucleotides can be modified to remove CpG motifs and/or to optimize codons for translation in a particular species, such as human, canine, feline, equine, ovine, bovine, etc. species. In some embodiments, the polynucleotides are optimized for human codon usage (i.e., human codon-optimized). In some embodiments, the polynucleotides are modified to remove CpG motifs. In other embodiments, the provided polynucleotides are modified to remove CpG motifs and are codon-optimized, such as human codon-optimized. Methods of codon optimization and CpG motif detection and modification are well-known. Typically, polynucleotide optimization enhances transgene expression, increases transgene stability and preserves the amino acid sequence of the encoded polypeptide. Exemplary optimized polynucleotide sequences, encoding exemplary immunomodulatory polypeptides, are set forth in SEQ ID NOs: 102-107. 
     In some cases, the polynucleotide contains a signal sequence that encodes a signal peptide. For example, the signal sequence may encode a signal peptide derived from CD33, IL-12p40 or IL-12p35. Some such CD33, IL-12p40 or IL-12p35 signal peptides may have the sequence set forth in SEQ ID NO: 18, 12, or 19, respectively, or a sequence that has at least 95% sequence identity to such a sequence. 
     In some embodiments, the polynucleotide encoding the immunomodulatory polypeptide and/or recombinant receptor contains at least one promoter that is operatively linked to control expression of the immunomodulatory polypeptide and/or recombinant receptor. In some examples, the polynucleotide contains two, three, or more promoters operatively linked to control expression of the immunomodulatory polypeptide and/or recombinant receptor. 
     In some embodiments, expression of the immunomodulatory polypeptide and/or recombinant receptor is inducible or conditional. Thus, in some aspects, the polynucleotide encoding the immunomodulatory polypeptide and/or recombinant receptor contains a conditional promoter, enhancer, or transactivator. In some such aspects, the conditional promoter, enhancer, or transactivator is an inducible promoter, enhancer, or transactivator or a repressible promoter, enhancer, or transactivator. For example, in some embodiments, an inducible or conditional promoter can be used to restrict expression of the immunomodulatory polypeptide and/or recombinant receptor to a specific microenvironment, such as a tumor microenvironment. The tumor microenvironment includes conditions such as hypoxia and low glucose. In some embodiments, the inducible or conditional promoter is active in the presence of one or more conditions in the tumor microenvironment, such as hypoxia, low glucose, acidic pH, and/or oxidative stress. In other embodiments, expression driven by the inducible or conditional promoter is regulated by exposure to an exogenous agent, such as heat, radiation, or drug. 
     In some embodiments, expression of the immunomodulatory polypeptide and/or recombinant receptor is limited to hypoxic conditions. For example, hypoxia-inducible transcription factor-1 alpha (HIF-1 alpha)-mediated transcription binds to DNA motifs known as hypoxia response elements (HREs) under hypoxic conditions. Hence, HREs can be used to drive transgene expression specifically within areas of hypoxia, such as tumors. For example, a promoter yielding hypoxia-inducible gene expression can be constructed by combining one or more hypoxia response elements (HRE), from HIF-1-responsive genes, having the consensus core sequence 5′-(A/G)CGT(G/C)(G/C)-3′ with a promoter, such as a basal promoter (e.g., CMV, SV40, or elongation factor-1 (EF-1) promoter). Exemplary HIF-1-responsive genes include erythropoietin (Epo), VEGF-A, phosphoglycerate kinase 1 (PGK1), lactate dehydrogenase A (LDH A), aldolase A (ALDA) and glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and their respective HREs are set forth in SEQ ID NOs: 85-90. 
     In some embodiments, expression of the immunomodulatory polypeptide and/or recombinant receptor is restricted to conditions of low glucose. In such examples, a glucose-responsive promoter can be used to drive transgene expression in cells exposed to low glucose conditions, such as cells present in a tumor environment. Exemplary glucose-responsive promoters include the glucose-regulated protein GRP78 promoter and the hexokinase II promoter. 
     In some embodiments, exogenously controlled inducible promoters can be used to regulate expression of modulatory polypeptide and/or recombinant receptor. For example, radiation-inducible promoters, heat-inducible promoters, and/or drug-inducible promoters can be used to selectively drive transgene expression in, for example, targeted regions. In such embodiments, the location, duration, and level of transgene expression can be regulated by the administration of the exogenous source of induction. 
     In some embodiments transgene expression is limited to a radiation field upon application of radiation therapy, using a radiation inducible promoter. Methods of radiation therapy, such as conformal radiation therapy, interstitial radiation therapy, brachytherapy, or targeted delivery of radioisotopes can be exploited to induce localized expression of the immunomodulatory polypeptide and/or recombinant receptor under the regulation of a radiation-inducible promoter. In response to ionizing radiation, cells activate transcription of a variety of genes, such as c-jun, NFP, EGR-1 and p21(WAF-1). Exemplary radiation-inducible promoters include: EGR-1, Waf-1, RecA, and cIAP2 promoters. CArG elements of the EGR-1 promoter contain the consensus sequence CC(A+T rich) 6 GG motif (e.g., CCTTATTTGG; SEQ ID NO: 91), and also confer dose-dependent expression in response to exposure to radiation. Exemplary synthetic promoters can contain 1 or more CArG elements, such as 1, 2, 4, 6, 8, 10, 12, 14, or more CArG elements. Exemplary synthetic CArG-containing promoters are set forth in SEQ ID NOS: 92-95. When radiation inducible promoters are employed, cells provided herein, containing the constructs provided herein, containing a radiation-inducible promoter. 
     In some embodiments, expression of the immunomodulatory polypeptide and/or recombinant receptor is regulated by a heat inducible promoter. The cellular response to hyperthermia is associated with the synthesis of heat shock proteins (HSPs). Thus, expression of the modulatory polypeptide and/or recombinant receptor can be regulated by an HSP promoter, such as an HSP70B promoter, which will selectively activate transgene expression following hyperthermia treatment, thereby controlling the location, duration and level of expression of the transgene. In some embodiments, heat shock elements (HSE) can be introduced into the HSP promoter or other promoter to enhance the transcriptional response to heat. Gadd 153 is another exemplary heat-inducible promoter. Ultrasound and electromagnetic fields can also be used to stimulate transgene expression under the regulation of an HSP promoter. Temperatures and other exogenous forms of energy transfer, such as ultrasound and electromagnetic radiation, resulting in transgene expression in such systems can be empirically determined. In some embodiments, feedback loops can be incorporated to enhance transgene expression (see, e.g., Emilusen et al., Urol Int. 2001; 67(3):216-223). 
     In some embodiments, expression of the immunomodulatory polypeptide and/or recombinant receptor is regulated using or a drug-inducible promoter. For example, in some cases, the promoter, enhancer, or transactivator comprises a Lac operator sequence, a tetracycline operator sequence, a galactose operator sequence, a doxycycline operator sequence, a rapamycin operator sequence, a tamoxifen operator sequence, or a hormone-responsive operator sequence, or an analog thereof. In some instances, the inducible promoter comprises a tetracycline response element (TRE). In some embodiments, the inducible promoter comprises an estrogen response element (ERE), which can activate gene expression in the presence of tamoxifen. In some instances a drug-inducible element, such as a TRE, can be combined with a selected promoter to enhance transcription in the presence of drug, such as doxycycline. In some embodiments, the drug-inducible promoter is a small molecule-inducible promoter. Typically, a drug-inducible operator, such as a tetracycline operator, is an allosteric-on system, in which administration of a selected drug, such as doxycycline, initiates transcription of an otherwise silent transgene. In some embodiments, the multidrug resistance (mdr1) gene promoter, which contains drug-inducible response elements, can be employed to drive drug-dependent expression of the transgene. Effective doses of drug or hormone to achieve desired levels of transgene expression can be empirically determined, and methods of determining effective doses are well-known. 
     In some aspects, the expression of the immunomodulatory polypeptide is effected in the presence of an immune cell, e.g., T cell, activation, such as by a T cell activation factor. For example, in some instances, the promoter, enhancer or other response element or portion thereof is recognized by a transcription factor to drive expression of a gene whose activity is normally turned on by T cell activation. In some embodiments, the T cell activation factor can be a regulatory domain or region (e.g. promoter, enhancer or other response element) of a transcription factor whose activity is turned on by T cell activation. In some embodiments, the T cell activation factor is responsive to one or more of T cell activation, signal strength of TCR signaling and/or quality of TCR signaling. 
     In some embodiments, the T cell activation factor can be a regulatory element, such as a promoter, enhancer or response element or elements, that contains a binding site for a T cell transcription factor, and that thereby is associated with the downstream activity of a T cell transcription factor. In some embodiments, the transcription factor is nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, or NFκB. For example, in some embodiments, the T cell activation factor contains a response element or elements recognized by a nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, and NFκB. In some embodiments, the T cell activation factor can contain a regulatory element or elements recognized by or responsive to one or two, and in some cases three or more, unique transcription factors. 
     It is contemplated that one or more of the inducible, condition-dependent, and/or cell-specific promoters and/or regulatory elements can be combined to restrict and/or sensitize expression of the immunomodulatory polypeptide and/or recombinant receptor provided herein. 
     In some embodiments, such as those where the polynucleotide contains a first and second nucleic acid sequence, the polynucleotide further contains a nucleic acid sequence encoding a linking peptide between the first and second nucleic acid sequences. In some such cases, the linking peptide separates the translation products of the first and second nucleic acid sequences during or after translation. In some aspects, the linking peptide contains an internal ribosome entry site (IRES), a self-cleaving peptide, or a peptide that causes ribosome skipping, such as a T2A peptide. 
     In some embodiments, the polynucleotide encoding the immunomodulatory polypeptide and/or recombinant receptor is introduced into a composition containing cultured cells, such as by retroviral transduction, transfection, or transformation. 
     In some embodiments, the polynucleotide (nucleic acid molecule) is one that encodes the immunomodulatory polypeptide and/or recombinant receptor, e.g., chimeric receptor, such as any described above. Also provided are vectors or constructs containing such nucleic acid molecules. In some embodiments, the vectors or constructs contain one or more promoters operatively linked to the nucleotide encoding the polypeptide or receptor to drive expression thereof. In some embodiments, the promoter is operatively linked to one or more than one nucleic acid molecule. 
     Thus, also provided are vectors, such as those that contain any of the polynucleotides provided herein. In some cases, the vector is a viral vector, such as a retroviral vector, e.g., a lentiviral vector or a gammaretroviral vector. 
     In some embodiments, the vector or construct can contain a single promoter that drives the expression of one or more nucleic acid molecules. In some embodiments, such promoters can be multicistronic (bicistronic or tricistronic, see e.g., U.S. Pat. No. 6,060,273). For example, in some embodiments, transcription units can be engineered as a bicistronic unit containing an IRES (internal ribosome entry site), which allows coexpression of gene products (e.g. encoding a first and second recombinant receptor) by a message from a single promoter. Alternatively, in some cases, a single promoter may direct expression of an RNA that contains, in a single open reading frame (ORF), two or three genes (e.g. encoding the molecule involved in modulating a metabolic pathway and encoding the recombinant receptor) separated from one another by sequences encoding a self-cleavage peptide (e.g., 2A sequences) or a protease recognition site (e.g., furin). The ORF thus encodes a single polypeptide, which, either during (in the case of 2A) or after translation, is processed into the individual proteins. In some cases, the peptide, such as T2A, can cause the ribosome to skip (ribosome skipping) synthesis of a peptide bond at the C-terminus of a 2A element, leading to separation between the end of the 2A sequence and the next peptide downstream (see, for example, de Felipe.  Genetic Vaccines and Ther.  2:13 (2004) and deFelipe et al.  Traffic  5:616-626 (2004)). Many 2A elements are known in the art. Examples of 2A sequences that can be used in the methods and nucleic acids disclosed herein, without limitation, 2A sequences from the foot-and-mouth disease virus (F2A, e.g., SEQ ID NO: 100), equine rhinitis A virus (E2A, e.g., SEQ ID NO: 99), Thosea asigna virus (T2A, e.g., SEQ ID NO: 76 or 96), and porcine teschovirus-1 (P2A, e.g., SEQ ID NO: 97 or 98) as described in U.S. Patent Publication No. 20070116690. 
     B. Cells and Preparation of Cells for Engineering 
     Also provided are cells, such as cells that contain the immunomodulatory polypeptide and/or an engineered recombinant receptor, such as described herein. In some embodiments, the cells are capable of secreting or are designed to secrete the immunomodulatory peptide. In some embodiments, the engineered cell secretes an immunomodulatory polypeptide that exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. In some aspects, the engineered cell effects increased killing of a target cell expressing the target molecule compared to killing of cells not expressing the target molecule. In some instances, the increased persistence, activity, binding, and/or killing is greater than effected by a reference engineered cell expressing or secreting an immunomodulatory polypeptide comprising a polypeptide linker between subunits but not comprising the targeting moiety. 
     Also provided are populations of such cells, compositions containing such cells and/or enriched for such cells, such as in which cells expressing the immunomodulatory polypeptide and/or chimeric receptor make up at least 50, 60, 70, 80, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or more percent of the total cells in the composition or cells of a certain type such as T cells or CD8+ or CD4+ cells. Among the compositions are pharmaceutical compositions and formulations for administration, such as for adoptive cell therapy. Also provided are therapeutic methods for administering the cells and compositions to subjects, e.g., patients. 
     Thus, also provided are genetically engineered cells expressing the immunomodulatory polypeptides and/or recombinant receptors e.g., CARs. The cells generally are eukaryotic cells, such as mammalian cells, and typically are human cells. In some embodiments, the cells are derived from the blood, bone marrow, lymph, or lymphoid organs, are cells of the immune system, such as cells of the innate or adaptive immunity, e.g., myeloid or lymphoid cells, including lymphocytes, typically T cells and/or NK cells. Other exemplary cells include stem cells, such as multipotent and pluripotent stem cells, including induced pluripotent stem cells (iPSCs). The cells typically are primary cells, such as those isolated directly from a subject and/or isolated from a subject and frozen. In some embodiments, the cells include one or more subsets of T cells or other cell types, such as whole T cell populations, CD4+ cells, CD8+ cells, and subpopulations thereof, such as those defined by function, activation state, maturity, potential for differentiation, expansion, recirculation, localization, and/or persistence capacities, antigen-specificity, type of antigen receptor, presence in a particular organ or compartment, marker or cytokine secretion profile, and/or degree of differentiation. With reference to the subject to be treated, the cells may be allogeneic and/or autologous. Among the methods include off-the-shelf methods. In some aspects, such as for off-the-shelf technologies, the cells are pluripotent and/or multipotent, such as stem cells, such as induced pluripotent stem cells (iPSCs). In some embodiments, the methods include isolating cells from the subject, preparing, processing, culturing, and/or engineering them, as described herein, and re-introducing them into the same patient, before or after cryopreservation. 
     Among the sub-types and subpopulations of T cells and/or of CD4+ and/or of CD8+ T cells are naïve T (T N ) cells, effector T cells (T EFF ), memory T cells and sub-types thereof, such as stem cell memory T (T SCM ), central memory T (T CM ), effector memory T (T EM ), or terminally differentiated effector memory T cells, tumor-infiltrating lymphocytes (TIL), immature T cells, mature T cells, helper T cells, cytotoxic T cells, mucosa-associated invariant T (MAIT) cells, naturally occurring and adaptive regulatory T (Treg) cells, helper T cells, such as TH1 cells, TH2 cells, TH3 cells, TH17 cells, TH9 cells, TH22 cells, follicular helper T cells, alpha/beta T cells, and delta/gamma T cells. 
     In some embodiments, the cells are natural killer (NK) cells. In some embodiments, the cells are monocytes or granulocytes, e.g., myeloid cells, macrophages, neutrophils, dendritic cells, mast cells, eosinophils, and/or basophils. 
     In some embodiments, the cells include one or more nucleic acids introduced via genetic engineering, and thereby express recombinant or genetically engineered products of such nucleic acids. In some embodiments, the nucleic acids are heterologous, i.e., normally not present in a cell or sample obtained from the cell, such as one obtained from another organism or cell, which for example, is not ordinarily found in the cell being engineered and/or an organism from which such cell is derived. In some embodiments, the nucleic acids are not naturally occurring, such as a nucleic acid not found in nature, including one comprising chimeric combinations of nucleic acids encoding various domains from multiple different cell types. 
     In some embodiments, preparation of the engineered cells includes one or more culture and/or preparation steps. The cells for introduction of the immunomodulatory polypeptide and/or recombinant receptor, e.g., CAR, may be isolated from a sample, such as a biological sample, e.g., one obtained from or derived from a subject. In some embodiments, the subject from which the cell is isolated is one having the disease or condition or in need of a cell therapy or to which cell therapy will be administered. The subject in some embodiments is a human in need of a particular therapeutic intervention, such as the adoptive cell therapy for which cells are being isolated, processed, and/or engineered. 
     Accordingly, the cells in some embodiments are primary cells, e.g., primary human cells. The samples include tissue, fluid, and other samples taken directly from the subject, as well as samples resulting from one or more processing steps, such as separation, centrifugation, genetic engineering (e.g. transduction with viral vector), washing, and/or incubation. The biological sample can be a sample obtained directly from a biological source or a sample that is processed. Biological samples include, but are not limited to, body fluids, such as blood, plasma, serum, cerebrospinal fluid, synovial fluid, urine and sweat, tissue and organ samples, including processed samples derived therefrom. 
     In some aspects, the sample from which the cells are derived or isolated is blood or a blood-derived sample, or is or is derived from an apheresis or leukapheresis product. Exemplary samples include whole blood, peripheral blood mononuclear cells (PBMCs), leukocytes, bone marrow, thymus, tissue biopsy, tumor, leukemia, lymphoma, lymph node, gut associated lymphoid tissue, mucosa associated lymphoid tissue, spleen, other lymphoid tissues, liver, lung, stomach, intestine, colon, kidney, pancreas, breast, bone, prostate, cervix, testes, ovaries, tonsil, or other organ, and/or cells derived therefrom. Samples include, in the context of cell therapy, e.g., adoptive cell therapy, samples from autologous and allogeneic sources. 
     In some embodiments, the cells are derived from cell lines, e.g., T cell lines. The cells in some embodiments are obtained from a xenogeneic source, for example, from mouse, rat, non-human primate, or pig. 
     In some embodiments, isolation of the cells includes one or more preparation and/or non-affinity based cell separation steps. In some examples, cells are washed, centrifuged, and/or incubated in the presence of one or more reagents, for example, to remove unwanted components, enrich for desired components, lyse or remove cells sensitive to particular reagents. In some examples, cells are separated based on one or more property, such as density, adherent properties, size, sensitivity and/or resistance to particular components. 
     In some examples, cells from the circulating blood of a subject are obtained, e.g., by apheresis or leukapheresis. The samples, in some aspects, contain lymphocytes, including T cells, monocytes, granulocytes, B cells, other nucleated white blood cells, red blood cells, and/or platelets, and in some aspects contains cells other than red blood cells and platelets. 
     In some embodiments, the blood cells collected from the subject are washed, e.g., to remove the plasma fraction and to place the cells in an appropriate buffer or media for subsequent processing steps. In some embodiments, the cells are washed with phosphate buffered saline (PBS). In some embodiments, the wash solution lacks calcium and/or magnesium and/or many or all divalent cations. In some aspects, a washing step is accomplished a semi-automated “flow-through” centrifuge (for example, the Cobe 2991 cell processor, Baxter) according to the manufacturer&#39;s instructions. In some aspects, a washing step is accomplished by tangential flow filtration (TFF) according to the manufacturer&#39;s instructions. In some embodiments, the cells are resuspended in a variety of biocompatible buffers after washing, such as, for example, Ca ++ /Mg ++  free PBS. In certain embodiments, components of a blood cell sample are removed and the cells directly resuspended in culture media. 
     In some embodiments, the methods include density-based cell separation methods, such as the preparation of white blood cells from peripheral blood by lysing the red blood cells and centrifugation through a Percoll or Ficoll gradient. 
     In some embodiments, the isolation methods include the separation of different cell types based on the expression or presence in the cell of one or more specific molecules, such as surface markers, e.g., surface proteins, intracellular markers, or nucleic acid. In some embodiments, any known method for separation based on such markers may be used. In some embodiments, the separation is affinity- or immunoaffinity-based separation. For example, the isolation in some aspects includes separation of cells and cell populations based on the cells&#39; expression or expression level of one or more markers, typically cell surface markers, for example, by incubation with an antibody or binding partner that specifically binds to such markers, followed generally by washing steps and separation of cells having bound the antibody or binding partner, from those cells having not bound to the antibody or binding partner. 
     Such separation steps can be based on positive selection, in which the cells having bound the reagents are retained for further use, and/or negative selection, in which the cells having not bound to the antibody or binding partner are retained. In some examples, both fractions are retained for further use. In some aspects, negative selection can be particularly useful where no antibody is available that specifically identifies a cell type in a heterogeneous population, such that separation is best carried out based on markers expressed by cells other than the desired population. 
     The separation need not result in 100% enrichment or removal of a particular cell population or cells expressing a particular marker. For example, positive selection of or enrichment for cells of a particular type, such as those expressing a marker, refers to increasing the number or percentage of such cells, but need not result in a complete absence of cells not expressing the marker. Likewise, negative selection, removal, or depletion of cells of a particular type, such as those expressing a marker, refers to decreasing the number or percentage of such cells, but need not result in a complete removal of all such cells. 
     In some examples, multiple rounds of separation steps are carried out, where the positively or negatively selected fraction from one step is subjected to another separation step, such as a subsequent positive or negative selection. In some examples, a single separation step can deplete cells expressing multiple markers simultaneously, such as by incubating cells with a plurality of antibodies or binding partners, each specific for a marker targeted for negative selection. Likewise, multiple cell types can simultaneously be positively selected by incubating cells with a plurality of antibodies or binding partners expressed on the various cell types. 
     For example, in some aspects, specific subpopulations of T cells, such as cells positive or expressing high levels of one or more surface markers, e.g., CD28 + , CD62L + , CCR7 + , CD27 + , CD127 + , CD4 + , CD8 + , CD45RA + , and/or CD45RO +  T cells, are isolated by positive or negative selection techniques. 
     For example, CD3 + , CD28 +  T cells can be positively selected using anti-CD3/anti-CD28 conjugated magnetic beads (e.g., DYNABEADS® M-450 CD3/CD28 T Cell Expander). 
     In some embodiments, isolation is carried out by enrichment for a particular cell population by positive selection, or depletion of a particular cell population, by negative selection. In some embodiments, positive or negative selection is accomplished by incubating cells with one or more antibodies or other binding agent that specifically bind to one or more surface markers expressed or expressed (marker + ) at a relatively higher level (marker high ) on the positively or negatively selected cells, respectively. 
     In some embodiments, T cells are separated from a PBMC sample by negative selection of markers expressed on non-T cells, such as B cells, monocytes, or other white blood cells, such as CD14. In some aspects, a CD4 +  or CD8 +  selection step is used to separate CD4 +  helper and CD8 +  cytotoxic T cells. Such CD4 +  and CD8 +  populations can be further sorted into sub-populations by positive or negative selection for markers expressed or expressed to a relatively higher degree on one or more naive, memory, and/or effector T cell subpopulations. 
     In some embodiments, CD8 +  cells are further enriched for or depleted of naive, central memory, effector memory, and/or central memory stem cells, such as by positive or negative selection based on surface antigens associated with the respective subpopulation. In some embodiments, enrichment for central memory T (T CM ) cells is carried out to increase efficacy, such as to improve long-term survival, expansion, and/or engraftment following administration, which in some aspects is particularly robust in such sub-populations. See Terakura et al. (2012) Blood. 1:72-82; Wang et al. (2012)  J Immunother.  35(9):689-701. In some embodiments, combining T CM -enriched CD8 +  T cells and CD4 +  T cells further enhances efficacy. 
     In embodiments, memory T cells are present in both CD62L +  and CD62L −  subsets of CD8 +  peripheral blood lymphocytes. PBMC can be enriched for or depleted of CD62L − CD8 +  and/or CD62L + CD8 +  fractions, such as using anti-CD8 and anti-CD62L antibodies. 
     In some embodiments, the enrichment for central memory T (T CM ) cells is based on positive or high surface expression of CD45RO, CD62L, CCR7, CD28, CD3, and/or CD 127; in some aspects, it is based on negative selection for cells expressing or highly expressing CD45RA and/or granzyme B. In some aspects, isolation of a CD8 +  population enriched for T CM  cells is carried out by depletion of cells expressing CD4, CD14, CD45RA, and positive selection or enrichment for cells expressing CD62L. In one aspect, enrichment for central memory T (T CM ) cells is carried out starting with a negative fraction of cells selected based on CD4 expression, which is subjected to a negative selection based on expression of CD14 and CD45RA, and a positive selection based on CD62L. Such selections in some aspects are carried out simultaneously and in other aspects are carried out sequentially, in either order. In some aspects, the same CD4 expression-based selection step used in preparing the CD8 +  cell population or subpopulation, also is used to generate the CD4 +  cell population or subpopulation, such that both the positive and negative fractions from the CD4-based separation are retained and used in subsequent steps of the methods, optionally following one or more further positive or negative selection steps. 
     In a particular example, a sample of PBMCs or other white blood cell sample is subjected to selection of CD4 +  cells, where both the negative and positive fractions are retained. The negative fraction then is subjected to negative selection based on expression of CD14 and CD45RA or ROR1, and positive selection based on a marker characteristic of central memory T cells, such as CD62L or CCR7, where the positive and negative selections are carried out in either order. 
     CD4 +  T helper cells are sorted into naïve, central memory, and effector cells by identifying cell populations that have cell surface antigens. CD4 +  lymphocytes can be obtained by standard methods. In some embodiments, naive CD4 +  T lymphocytes are CD45RO − , CD45RA + , CD62L + , CD4 +  T cells. In some embodiments, central memory CD4 +  cells are CD62L +  and CD45RO + . In some embodiments, effector CD4 +  cells are CD62L −  and CD45RO − . 
     In one example, to enrich for CD4 +  cells by negative selection, a monoclonal antibody cocktail typically includes antibodies to CD14, CD20, CD11b, CD16, HLA-DR, and CD8. In some embodiments, the antibody or binding partner is bound to a solid support or matrix, such as a magnetic bead or paramagnetic bead, to allow for separation of cells for positive and/or negative selection. For example, in some embodiments, the cells and cell populations are separated or isolated using immunomagnetic (or affinitymagnetic) separation techniques (reviewed in Methods in Molecular Medicine, vol. 58: Metastasis Research Protocols, Vol. 2: Cell Behavior In Vitro and In Vivo, p 17-25 Edited by: S. A. Brooks and U. Schumacher© Humana Press Inc., Totowa, N.J.). 
     In some aspects, the sample or composition of cells to be separated is incubated with small, magnetizable or magnetically responsive material, such as magnetically responsive particles or microparticles, such as paramagnetic beads (e.g., such as Dynabeads or MACS beads). The magnetically responsive material, e.g., particle, generally is directly or indirectly attached to a binding partner, e.g., an antibody, that specifically binds to a molecule, e.g., surface marker, present on the cell, cells, or population of cells that it is desired to separate, e.g., that it is desired to negatively or positively select. 
     In some embodiments, the magnetic particle or bead comprises a magnetically responsive material bound to a specific binding member, such as an antibody or other binding partner. There are many well-known magnetically responsive materials used in magnetic separation methods. Suitable magnetic particles include those described in Molday, U.S. Pat. No. 4,452,773, and in European Patent Specification EP 452342 B, which are hereby incorporated by reference. Colloidal sized particles, such as those described in Owen U.S. Pat. No. 4,795,698, and Liberti et al., U.S. Pat. No. 5,200,084 are other examples. 
     The incubation generally is carried out under conditions whereby the antibodies or binding partners, or molecules, such as secondary antibodies or other reagents, which specifically bind to such antibodies or binding partners, which are attached to the magnetic particle or bead, specifically bind to cell surface molecules if present on cells within the sample. 
     In some aspects, the sample is placed in a magnetic field, and those cells having magnetically responsive or magnetizable particles attached thereto will be attracted to the magnet and separated from the unlabeled cells. For positive selection, cells that are attracted to the magnet are retained; for negative selection, cells that are not attracted (unlabeled cells) are retained. In some aspects, a combination of positive and negative selection is performed during the same selection step, where the positive and negative fractions are retained and further processed or subject to further separation steps. 
     In certain embodiments, the magnetically responsive particles are coated in primary antibodies or other binding partners, secondary antibodies, lectins, enzymes, or streptavidin. In certain embodiments, the magnetic particles are attached to cells via a coating of primary antibodies specific for one or more markers. In certain embodiments, the cells, rather than the beads, are labeled with a primary antibody or binding partner, and then cell-type specific secondary antibody- or other binding partner (e.g., streptavidin)-coated magnetic particles, are added. In certain embodiments, streptavidin-coated magnetic particles are used in conjunction with biotinylated primary or secondary antibodies. 
     In some embodiments, the magnetically responsive particles are left attached to the cells that are to be subsequently incubated, cultured and/or engineered; in some aspects, the particles are left attached to the cells for administration to a patient. In some embodiments, the magnetizable or magnetically responsive particles are removed from the cells. Methods for removing magnetizable particles from cells are known and include, e.g., the use of competing non-labeled antibodies, magnetizable particles or antibodies conjugated to cleavable linkers, etc. In some embodiments, the magnetizable particles are biodegradable. 
     In some embodiments, the affinity-based selection is via magnetic-activated cell sorting (MACS) (Miltenyi Biotec, Auburn, Calif.). Magnetic Activated Cell Sorting (MACS) systems are capable of high-purity selection of cells having magnetized particles attached thereto. In certain embodiments, MACS operates in a mode wherein the non-target and target species are sequentially eluted after the application of the external magnetic field. That is, the cells attached to magnetized particles are held in place while the unattached species are eluted. Then, after this first elution step is completed, the species that were trapped in the magnetic field and were prevented from being eluted are freed in some manner such that they can be eluted and recovered. In certain embodiments, the non-target cells are labelled and depleted from the heterogeneous population of cells. 
     In certain embodiments, the isolation or separation is carried out using a system, device, or apparatus that carries out one or more of the isolation, cell preparation, separation, processing, incubation, culture, and/or formulation steps of the methods. In some aspects, the system is used to carry out each of these steps in a closed or sterile environment, for example, to minimize error, user handling and/or contamination. In one example, the system is a system as described in International Patent Application, Publication Number WO2009/072003, or US 20110003380 A1. 
     In some embodiments, the system or apparatus carries out one or more, e.g., all, of the isolation, processing, engineering, and formulation steps in an integrated or self-contained system, and/or in an automated or programmable fashion. In some aspects, the system or apparatus includes a computer and/or computer program in communication with the system or apparatus, which allows a user to program, control, assess the outcome of, and/or adjust various aspects of the processing, isolation, engineering, and formulation steps. 
     In some aspects, the separation and/or other steps is carried out using CliniMACS system (Miltenyi Biotec), for example, for automated separation of cells on a clinical-scale level in a closed and sterile system. Components can include an integrated microcomputer, magnetic separation unit, peristaltic pump, and various pinch valves. The integrated computer in some aspects controls all components of the instrument and directs the system to perform repeated procedures in a standardized sequence. The magnetic separation unit in some aspects includes a movable permanent magnet and a holder for the selection column. The peristaltic pump controls the flow rate throughout the tubing set and, together with the pinch valves, ensures the controlled flow of buffer through the system and continual suspension of cells. 
     The CliniMACS system in some aspects uses antibody-coupled magnetizable particles that are supplied in a sterile, non-pyrogenic solution. In some embodiments, after labelling of cells with magnetic particles the cells are washed to remove excess particles. A cell preparation bag is then connected to the tubing set, which in turn is connected to a bag containing buffer and a cell collection bag. The tubing set consists of pre-assembled sterile tubing, including a pre-column and a separation column, and are for single use only. After initiation of the separation program, the system automatically applies the cell sample onto the separation column. Labelled cells are retained within the column, while unlabeled cells are removed by a series of washing steps. In some embodiments, the cell populations for use with the methods described herein are unlabeled and are not retained in the column. In some embodiments, the cell populations for use with the methods described herein are labeled and are retained in the column. In some embodiments, the cell populations for use with the methods described herein are eluted from the column after removal of the magnetic field, and are collected within the cell collection bag. 
     In certain embodiments, separation and/or other steps are carried out using the CliniMACS Prodigy system (Miltenyi Biotec). The CliniMACS Prodigy system in some aspects is equipped with a cell processing unity that permits automated washing and fractionation of cells by centrifugation. The CliniMACS Prodigy system can also include an onboard camera and image recognition software that determines the optimal cell fractionation endpoint by discerning the macroscopic layers of the source cell product. For example, peripheral blood may be automatically separated into erythrocytes, white blood cells and plasma layers. The CliniMACS Prodigy system can also include an integrated cell cultivation chamber which accomplishes cell culture protocols such as, e.g., cell differentiation and expansion, antigen loading, and long-term cell culture. Input ports can allow for the sterile removal and replenishment of media and cells can be monitored using an integrated microscope. See, e.g., Klebanoff et al. (2012)  J Immunother.  35(9): 651-660, Terakura et al. (2012)  Blood.  1:72-82, and Wang et al. (2012)  J Immunother.  35(9):689-701. 
     In some embodiments, a cell population described herein is collected and enriched (or depleted) via flow cytometry, in which cells stained for multiple cell surface markers are carried in a fluidic stream. In some embodiments, a cell population described herein is collected and enriched (or depleted) via preparative scale (FACS)-sorting. In certain embodiments, a cell population described herein is collected and enriched (or depleted) by use of microelectromechanical systems (MEMS) chips in combination with a FACS-based detection system (see, e.g., WO 2010/033140, Cho et al. (2010)  Lab Chip  10, 1567-1573; and Godin et al. (2008) J Biophoton. 1(5):355-376. In both cases, cells can be labeled with multiple markers, allowing for the isolation of well-defined T cell subsets at high purity. 
     In some embodiments, the antibodies or binding partners are labeled with one or more detectable marker, to facilitate separation for positive and/or negative selection. For example, separation may be based on binding to fluorescently labeled antibodies. In some examples, separation of cells based on binding of antibodies or other binding partners specific for one or more cell surface markers are carried in a fluidic stream, such as by fluorescence-activated cell sorting (FACS), including preparative scale (FACS) and/or microelectromechanical systems (MEMS) chips, e.g., in combination with a flow-cytometric detection system. Such methods allow for positive and negative selection based on multiple markers simultaneously. 
     In some embodiments, the preparation methods include steps for freezing, e.g., cryopreserving, the cells, either before or after isolation, incubation, and/or engineering. In some embodiments, the freeze and subsequent thaw step removes granulocytes and, to some extent, monocytes in the cell population. In some embodiments, the cells are suspended in a freezing solution, e.g., following a washing step to remove plasma and platelets. Any of a variety of known freezing solutions and parameters in some aspects may be used. One example involves using PBS containing 20% DMSO and 8% human serum albumin (HSA), or other suitable cell freezing media. This is then diluted 1:1 with media so that the final concentration of DMSO and HSA are 10% and 4%, respectively. The cells are then frozen to −80° C. at a rate of 1° per minute and stored in the vapor phase of a liquid nitrogen storage tank. 
     In some embodiments, the provided methods include cultivation, incubation, culture, and/or genetic engineering steps. For example, in some embodiments, provided are methods for incubating and/or engineering the depleted cell populations and culture-initiating compositions. 
     Thus, in some embodiments, the cell populations are incubated in a culture-initiating composition. The incubation and/or engineering may be carried out in a culture vessel, such as a unit, chamber, well, column, tube, tubing set, valve, vial, culture dish, bag, or other container for culture or cultivating cells. 
     In some embodiments, the cells are incubated and/or cultured prior to or in connection with genetic engineering. The incubation steps can include culture, cultivation, stimulation, activation, and/or propagation. In some embodiments, the compositions or cells are incubated in the presence of stimulating conditions or a stimulatory agent. Such conditions include those designed to induce proliferation, expansion, activation, and/or survival of cells in the population, to mimic antigen exposure, and/or to prime the cells for genetic engineering, such as for the introduction of a recombinant antigen receptor. 
     The conditions can include one or more of particular media, temperature, oxygen content, carbon dioxide content, time, agents, e.g., nutrients, amino acids, antibiotics, ions, and/or stimulatory factors, such as cytokines, chemokines, antigens, binding partners, fusion proteins, recombinant soluble receptors, and any other agents designed to activate the cells. 
     In some embodiments, the stimulating conditions or agents include one or more agent, e.g., ligand, which is capable of activating an intracellular signaling domain of a TCR complex. In some aspects, the agent turns on or initiates TCR/CD3 intracellular signaling cascade in a T cell. Such agents can include antibodies, such as those specific for a TCR, e.g. anti-CD3. In some embodiments, the stimulating conditions include one or more agent, e.g. ligand, which is capable of stimulating a costimulatory receptor, e.g., anti-CD28. In some embodiments, such agents and/or ligands may be, bound to solid support such as a bead, and/or one or more cytokines. Optionally, the expansion method may further comprise the step of adding anti-CD3 and/or anti CD28 antibody to the culture medium (e.g., at a concentration of at least about 0.5 ng/ml). In some embodiments, the stimulating agents include IL-2, IL-15 and/or IL-7. In some aspects, the IL-2 concentration is at least about 10 units/mL. 
     In some aspects, incubation is carried out in accordance with techniques such as those described in U.S. Pat. No. 6,040,177 to Riddell et al., Klebanoff et al. (2012) J Immunother. 35(9): 651-660, Terakura et al. (2012) Blood. 1:72-82, and/or Wang et al. (2012) J Immunother. 35(9):689-701. 
     In some embodiments, the T cells are expanded by adding to the culture-initiating composition feeder cells, such as non-dividing peripheral blood mononuclear cells (PBMC), (e.g., such that the resulting population of cells contains at least about 5, 10, 20, or 40 or more PBMC feeder cells for each T lymphocyte in the initial population to be expanded); and incubating the culture (e.g. for a time sufficient to expand the numbers of T cells). In some aspects, the non-dividing feeder cells can comprise gamma-irradiated PBMC feeder cells. In some embodiments, the PBMC are irradiated with gamma rays in the range of about 3000 to 3600 rads to prevent cell division. In some aspects, the feeder cells are added to culture medium prior to the addition of the populations of T cells. 
     In some embodiments, the stimulating conditions include temperature suitable for the growth of human T lymphocytes, for example, at least about 25 degrees Celsius, generally at least about 30 degrees, and generally at or about 37 degrees Celsius. Optionally, the incubation may further comprise adding non-dividing EBV-transformed lymphoblastoid cells (LCL) as feeder cells. LCL can be irradiated with gamma rays in the range of about 6000 to 10,000 rads. The LCL feeder cells in some aspects is provided in any suitable amount, such as a ratio of LCL feeder cells to initial T lymphocytes of at least about 10:1. 
     In embodiments, antigen-specific T cells, such as antigen-specific CD4+ and/or CD8+ T cells, are obtained by stimulating naive or antigen specific T lymphocytes with antigen. For example, antigen-specific T cell lines or clones can be generated to cytomegalovirus antigens by isolating T cells from infected subjects and stimulating the cells in vitro with the same antigen. 
     C. Vectors and Methods for Genetic Engineering 
     Various methods for the introduction of genetically engineered components, e.g., immunomodulatory polypeptides and recombinant receptors, e.g., CARs or TCRs, are well known and may be used with the provided methods and compositions. Exemplary methods include those for transfer of nucleic acids encoding the polypeptides or receptors, including via viral vectors, e.g., retroviral or lentiviral, non-viral vectors or transposons, e.g. Sleeping Beauty transposon system. Methods of gene transfer can include transduction, electroporation or other method that results into gene transfer into the cell. 
     In some embodiments, gene transfer is accomplished by first stimulating the cell, such as by combining it with a stimulus that induces a response such as proliferation, survival, and/or activation, e.g., as measured by expression of a cytokine or activation marker, followed by transduction of the activated cells, and expansion in culture to numbers sufficient for clinical applications. 
     In some contexts, it may be desired to safeguard against the potential that overexpression of a stimulatory factor (for example, a lymphokine or a cytokine) could potentially result in an unwanted outcome or lower efficacy in a subject, such as a factor associated with toxicity in a subject. Thus, in some contexts, the engineered cells include gene segments that cause the cells to be susceptible to negative selection in vivo, such as upon administration in adoptive immunotherapy. For example in some aspects, the cells are engineered so that they can be eliminated as a result of a change in the in vivo condition of the patient to which they are administered. The negative selectable phenotype may result from the insertion of a gene that confers sensitivity to an administered agent, for example, a compound. Negative selectable genes include the Herpes simplex virus type I thymidine kinase (HSV-I TK) gene (Wigler et al., Cell 2:223, 1977) which confers ganciclovir sensitivity; the cellular hypoxanthine phosphoribosyltransferase (HPRT) gene, the cellular adenine phosphoribosyltransferase (APRT) gene, bacterial cytosine deaminase, (Mullen et al., Proc. Natl. Acad. Sci. USA. 89:33 (1992)). 
     In some embodiments, recombinant nucleic acids are transferred into cells using recombinant infectious virus particles, such as, e.g., vectors derived from simian virus 40 (SV40), adenoviruses, adeno-associated virus (AAV). In some embodiments, recombinant nucleic acids are transferred into T cells using recombinant lentiviral vectors or retroviral vectors, such as gamma-retroviral vectors (see, e.g., Koste et al. (2014) Gene Therapy 2014 Apr. 3. doi: 10.1038/gt.2014.25; Carlens et al. (2000) Exp Hematol 28(10): 1137-46; Alonso-Camino et al. (2013) Mol Ther Nucl Acids 2, e93; Park et al., Trends Biotechnol. 2011 Nov. 29(11): 550-557. 
     In some embodiments, the retroviral vector has a long terminal repeat sequence (LTR), e.g., a retroviral vector derived from the Moloney murine leukemia virus (MoMLV), myeloproliferative sarcoma virus (MPSV), murine embryonic stem cell virus (MESV), murine stem cell virus (MSCV), spleen focus forming virus (SFFV), or adeno-associated virus (AAV). Most retroviral vectors are derived from murine retroviruses. In some embodiments, the retroviruses include those derived from any avian or mammalian cell source. The retroviruses typically are amphotropic, meaning that they are capable of infecting host cells of several species, including humans. In one embodiment, the gene to be expressed replaces the retroviral gag, pol and/or env sequences. A number of illustrative retroviral systems have been described (e.g., U.S. Pat. Nos. 5,219,740; 6,207,453; 5,219,740; Miller and Rosman (1989) BioTechniques 7:980-990; Miller, A. D. (1990) Human Gene Therapy 1:5-14; Scarpa et al. (1991) Virology 180:849-852; Burns et al. (1993) Proc. Natl. Acad. Sci. USA 90:8033-8037; and Boris-Lawrie and Temin (1993) Cur. Opin. Genet. Develop. 3:102-109. 
     Methods of lentiviral transduction are known. Exemplary methods are described in, e.g., Wang et al. (2012)  J. Immunother.  35(9): 689-701; Cooper et al. (2003) Blood. 101:1637-1644; Verhoeyen et al. (2009)  Methods Mol Biol.  506: 97-114; and Cavalieri et al. (2003) Blood. 102(2): 497-505. 
     In some embodiments, recombinant nucleic acids are transferred into T cells via electroporation (see, e.g., Chicaybam et al, (2013)  PLoS ONE  8(3): e60298 and Van Tedeloo et al. (2000)  Gene Therapy  7(16): 1431-1437). In some embodiments, recombinant nucleic acids are transferred into T cells via transposition (see, e.g., Manuri et al. (2010) Hum Gene Ther 21(4): 427-437; Sharma et al. (2013)  Molec Ther Nucl Acids  2, e74; and Huang et al. (2009)  Methods Mol Biol  506: 115-126). Other methods of introducing and expressing genetic material in immune cells include calcium phosphate transfection (e.g., as described in Current Protocols in Molecular Biology, John Wiley &amp; Sons, New York. N.Y.), protoplast fusion, cationic liposome-mediated transfection; tungsten particle-facilitated microparticle bombardment (Johnston, Nature, 346: 776-777 (1990)); and strontium phosphate DNA co-precipitation (Brash et al., Mol. Cell Biol., 7: 2031-2034 (1987)). 
     Other approaches and vectors for transfer of the nucleic acids encoding the recombinant products are those described, e.g., in international patent application, Publication No.: WO2014055668, and U.S. Pat. No. 7,446,190. 
     In some embodiments, the cells, e.g., T cells, may be transfected either during or after expansion, e.g. with an immunomodulatory polypeptide, a T cell receptor (TCR), or a chimeric antigen receptor (CAR). This transfection for the introduction of the gene of the desired polypeptide or receptor can be carried out with any suitable retroviral vector, for example. The genetically modified cell population can then be liberated from the initial stimulus (the CD3/CD28 stimulus, for example) and subsequently be stimulated with a second type of stimulus e.g. via a de novo introduced receptor). This second type of stimulus may include an antigenic stimulus in form of a peptide/MHC molecule, the cognate (cross-linking) ligand of the genetically introduced receptor (e.g. natural ligand of a CAR) or any ligand (such as an antibody) that directly binds within the framework of the new receptor (e.g. by recognizing constant regions within the receptor). See, for example, Cheadle et al, “Chimeric antigen receptors for T-cell based therapy” Methods Mol Biol. 2012; 907:645-66 or Barrett et al., Chimeric Antigen Receptor Therapy for Cancer Annual Review of Medicine Vol. 65: 333-347 (2014). 
     Among additional nucleic acids, e.g., genes for introduction are those to improve the efficacy of therapy, such as by promoting viability and/or function of transferred cells; genes to provide a genetic marker for selection and/or evaluation of the cells, such as to assess in vivo survival or localization; genes to improve safety, for example, by making the cell susceptible to negative selection in vivo as described by Lupton S. D. et al.,  Mol. and Cell Biol.,  11:6 (1991); and Riddell et al.,  Human Gene Therapy  3:319-338 (1992); see also the publications of PCT/US91/08442 and PCT/US94/05601 by Lupton et al. describing the use of bifunctional selectable fusion genes derived from fusing a dominant positive selectable marker with a negative selectable marker. See, e.g., Riddell et al., U.S. Pat. No. 6,040,177, at columns 14-17. 
     IV. COMPOSITIONS, FORMULATIONS AND METHODS OF ADMINISTRATION 
     Also provided are compositions containing the chimeric receptor, such as CAR or TCR, and compositions containing the engineered cells, including pharmaceutical compositions and formulations. Also provided are methods of using and uses of the compositions, such as in the treatment of diseases, conditions, and disorders in which the antigen is expressed, or in detection, diagnostic, and prognostic methods. 
     A. Compositions/Formulations 
     The term “pharmaceutical formulation” refers to a preparation which is in such form as to permit the biological activity of an active ingredient contained therein to be effective, and which contains no additional components which are unacceptably toxic to a subject to which the formulation would be administered. 
     A “pharmaceutically acceptable carrier” refers to an ingredient in a pharmaceutical formulation, other than an active ingredient, which is nontoxic to a subject. A pharmaceutically acceptable carrier includes, but is not limited to, a buffer, excipient, stabilizer, or preservative. 
     In some aspects, the choice of carrier is determined in part by the particular cell and/or by the method of administration. Accordingly, there are a variety of suitable formulations. For example, the pharmaceutical composition can contain preservatives. Suitable preservatives may include, for example, methylparaben, propylparaben, sodium benzoate, and benzalkonium chloride. In some aspects, a mixture of two or more preservatives is used. The preservative or mixtures thereof are typically present in an amount of about 0.0001% to about 2% by weight of the total composition. Carriers are described, e.g., by Remington&#39;s Pharmaceutical Sciences 16th edition, Osol, A. Ed. (1980). Pharmaceutically acceptable carriers are generally nontoxic to recipients at the dosages and concentrations employed, and include, but are not limited to: buffers such as phosphate, citrate, and other organic acids; antioxidants including ascorbic acid and methionine; preservatives (such as octadecyldimethylbenzyl ammonium chloride; hexamethonium chloride; benzalkonium chloride; benzethonium chloride; phenol, butyl or benzyl alcohol; alkyl parabens such as methyl or propyl paraben; catechol; resorcinol; cyclohexanol; 3-pentanol; and m-cresol); low molecular weight (less than about 10 residues) polypeptides; proteins, such as serum albumin, gelatin, or immunoglobulins; hydrophilic polymers such as polyvinylpyrrolidone; amino acids such as glycine, glutamine, asparagine, histidine, arginine, or lysine; monosaccharides, disaccharides, and other carbohydrates including glucose, mannose, or dextrins; chelating agents such as EDTA; sugars such as sucrose, mannitol, trehalose or sorbitol; salt-forming counter-ions such as sodium; metal complexes (e.g. Zn-protein complexes); and/or non-ionic surfactants such as polyethylene glycol (PEG). 
     Buffering agents in some aspects are included in the compositions. Suitable buffering agents include, for example, citric acid, sodium citrate, phosphoric acid, potassium phosphate, and various other acids and salts. In some aspects, a mixture of two or more buffering agents is used. The buffering agent or mixtures thereof are typically present in an amount of about 0.001% to about 4% by weight of the total composition. Methods for preparing administrable pharmaceutical compositions are known. Exemplary methods are described in more detail in, for example, Remington: The Science and Practice of Pharmacy, Lippincott Williams &amp; Wilkins; 21st ed. (May 1, 2005). 
     The formulation or composition may also contain more than one active ingredient useful for the particular indication, disease, or condition being treated with the cells, preferably those with activities complementary to the cell, where the respective activities do not adversely affect one another. Such active ingredients are suitably present in combination in amounts that are effective for the purpose intended. Thus, in some embodiments, the pharmaceutical composition further includes other pharmaceutically active agents or drugs, such as chemotherapeutic agents, e.g., asparaginase, busulfan, carboplatin, cisplatin, daunorubicin, doxorubicin, fluorouracil, gemcitabine, hydroxyurea, methotrexate, paclitaxel, rituximab, vinblastine, vincristine, etc. In some embodiments, the cells or antibodies are administered in the form of a salt, e.g., a pharmaceutically acceptable salt. Suitable pharmaceutically acceptable acid addition salts include those derived from mineral acids, such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric, and sulphuric acids, and organic acids, such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, and aryl sulfonic acids, for example, p-toluenesulfonic acid. 
     Active ingredients may be entrapped in microcapsules, in colloidal drug delivery systems (for example, liposomes, albumin microspheres, microemulsions, nanoparticles and nanocapsules) or in macroemulsions. In certain embodiments, the pharmaceutical composition is formulated as an inclusion complex, such as cyclodextrin inclusion complex, or as a liposome. Liposomes can serve to target the host cells (e.g., T-cells or NK cells) to a particular tissue. Many methods are available for preparing liposomes, such as those described in, for example, Szoka et al., Ann. Rev. Biophys. Bioeng., 9: 467 (1980), and U.S. Pat. Nos. 4,235,871, 4,501,728, 4,837,028, and 5,019,369. 
     The pharmaceutical composition in some aspects can employ time-released, delayed release, and sustained release delivery systems such that the delivery of the composition occurs prior to, and with sufficient time to cause, sensitization of the site to be treated. Many types of release delivery systems are available and known. Such systems can avoid repeated administrations of the composition, thereby increasing convenience to the subject and the physician. 
     The pharmaceutical composition in some embodiments contains immunomodulatory polypeptides and/or engineered cells in amounts effective to treat or prevent the disease or condition, such as a therapeutically effective or prophylactically effective amount. Therapeutic or prophylactic efficacy in some embodiments is monitored by periodic assessment of treated subjects. For repeated administrations over several days or longer, depending on the condition, the treatment is repeated until a desired suppression of disease symptoms occurs. However, other dosage regimens may be useful and can be determined. The desired dosage can be delivered by a single bolus administration of the composition, by multiple bolus administrations of the composition, or by continuous infusion administration of the composition. 
     The immunomodulatory polypeptides and/or engineered cells may be administered using standard administration techniques, formulations, and/or devices. Provided are formulations and devices, such as syringes and vials, for storage and administration of the compositions. Administration of the engineered cells can be autologous or heterologous. For example, immunoresponsive cells or progenitors can be obtained from one subject, and administered to the same subject or a different, compatible subject. Peripheral blood derived immunoresponsive cells or their progeny (e.g., in vivo, ex vivo or in vitro derived) can be administered via localized injection, including catheter administration, systemic injection, localized injection, intravenous injection, or parenteral administration. When administering a therapeutic composition (e.g., a pharmaceutical composition containing a genetically modified immunoresponsive cell), it will generally be formulated in a unit dosage injectable form (solution, suspension, emulsion). 
     Formulations include those for oral, intravenous, intraperitoneal, subcutaneous, pulmonary, transdermal, intramuscular, intranasal, buccal, sublingual, or suppository administration. In some embodiments, the cell populations are administered parenterally. The term “parenteral,” as used herein, includes intravenous, intramuscular, subcutaneous, rectal, vaginal, and intraperitoneal administration. In some embodiments, the cell populations are administered to a subject using peripheral systemic delivery by intravenous, intraperitoneal, or subcutaneous injection. 
     Compositions in some embodiments are provided as sterile liquid preparations, e.g., isotonic aqueous solutions, suspensions, emulsions, dispersions, or viscous compositions, which may in some aspects be buffered to a selected pH. Liquid preparations are normally easier to prepare than gels, other viscous compositions, and solid compositions. Additionally, liquid compositions are somewhat more convenient to administer, especially by injection. Viscous compositions, on the other hand, can be formulated within the appropriate viscosity range to provide longer contact periods with specific tissues. Liquid or viscous compositions can comprise carriers, which can be a solvent or dispersing medium containing, for example, water, saline, phosphate buffered saline, polyol (for example, glycerol, propylene glycol, liquid polyethylene glycol) and suitable mixtures thereof. 
     Sterile injectable solutions can be prepared by incorporating the cells in a solvent, such as in admixture with a suitable carrier, diluent, or excipient such as sterile water, physiological saline, glucose, dextrose, or the like. The compositions can also be lyophilized. The compositions can contain auxiliary substances such as wetting, dispersing, or emulsifying agents (e.g., methylcellulose), pH buffering agents, gelling or viscosity enhancing additives, preservatives, flavoring agents, colors, and the like, depending upon the route of administration and the preparation desired. Standard texts may in some aspects be consulted to prepare suitable preparations. 
     Various additives which enhance the stability and sterility of the compositions, including antimicrobial preservatives, antioxidants, chelating agents, and buffers, can be added. Prevention of the action of microorganisms can be ensured by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, sorbic acid, and the like. Prolonged absorption of the injectable pharmaceutical form can be brought about by the use of agents delaying absorption, for example, aluminum monostearate and gelatin. 
     Sustained-release preparations may be prepared. Suitable examples of sustained-release preparations include semipermeable matrices of solid hydrophobic polymers containing the antibody, which matrices are in the form of shaped articles, e.g. films, or microcapsules. 
     The formulations to be used for in vivo administration are generally sterile. Sterility may be readily accomplished, e.g., by filtration through sterile filtration membranes. 
     B. Methods of Administration 
     Provided are methods of administering the immunomodulatory polypeptides, engineered cells, and compositions, and uses of such immunomodulatory polypeptides, engineered cells, and compositions to treat or prevent diseases, conditions, and disorders, including cancers. In some embodiments, the immunomodulatory polypeptides, engineered cells, and compositions are administered to a subject or patient having the particular disease or condition to be treated, e.g., via adoptive cell therapy, such as adoptive T cell therapy. In some embodiments, provided cells and compositions are administered to a subject, such as a subject having or at risk for the disease or condition. In some aspects, the methods thereby treat, e.g., ameliorate one or more symptom of, the disease or condition, such as by lessening tumor burden in a cancer expressing an antigen recognized by an engineered T cell. 
     Methods for administration of engineered cells for adoptive cell therapy are known and may be used in connection with the provided methods and compositions. For example, adoptive T cell therapy methods are described, e.g., in US Patent Application Publication No. 2003/0170238 to Gruenberg et al; U.S. Pat. No. 4,690,915 to Rosenberg; Rosenberg (2011) Nat Rev Clin Oncol. 8(10):577-85). See, e.g., Themeli et al. (2013)  Nat Biotechnol.  31(10): 928-933; Tsukahara et al. (2013)  Biochem Biophys Res Commun  438(1): 84-9; Davila et al. (2013)  PLoS ONE  8(4): e61338. 
     As used herein, a “subject” is a mammal, such as a human or other animal, and typically is human. In some embodiments, the subject, e.g., patient, to whom the immunomodulatory polypeptides, engineered cells, or compositions are administered, is a mammal, typically a primate, such as a human. In some embodiments, the primate is a monkey or an ape. The subject can be male or female and can be any suitable age, including infant, juvenile, adolescent, adult, and geriatric subjects. In some embodiments, the subject is a non-primate mammal, such as a rodent. 
     As used herein, “treatment” (and grammatical variations thereof such as “treat” or “treating”) refers to complete or partial amelioration or reduction of a disease or condition or disorder, or a symptom, adverse effect or outcome, or phenotype associated therewith. Desirable effects of treatment include, but are not limited to, preventing occurrence or recurrence of disease, alleviation of symptoms, diminishment of any direct or indirect pathological consequences of the disease, preventing metastasis, decreasing the rate of disease progression, amelioration or palliation of the disease state, and remission or improved prognosis. The terms do not imply complete curing of a disease or complete elimination of any symptom or effect(s) on all symptoms or outcomes. 
     As used herein, “delaying development of a disease” means to defer, hinder, slow, retard, stabilize, suppress and/or postpone development of the disease (such as cancer). This delay can be of varying lengths of time, depending on the history of the disease and/or individual being treated. As is evident to one skilled in the art, a sufficient or significant delay can, in effect, encompass prevention, in that the individual does not develop the disease. For example, a late stage cancer, such as development of metastasis, may be delayed. 
     “Preventing,” as used herein, includes providing prophylaxis with respect to the occurrence or recurrence of a disease in a subject that may be predisposed to the disease but has not yet been diagnosed with the disease. In some embodiments, the provided cells and compositions are used to delay development of a disease or to slow the progression of a disease. 
     As used herein, to “suppress” a function or activity is to reduce the function or activity when compared to otherwise same conditions except for a condition or parameter of interest, or alternatively, as compared to another condition. For example, cells that suppress tumor growth reduce the rate of growth of the tumor compared to the rate of growth of the tumor in the absence of the cells. 
     An “effective amount” of an agent, e.g., a pharmaceutical formulation, cells, or composition, in the context of administration, refers to an amount effective, at dosages/amounts and for periods of time necessary, to achieve a desired result, such as a therapeutic or prophylactic result. 
     A “therapeutically effective amount” of an agent, e.g., a pharmaceutical formulation or engineered cells, refers to an amount effective, at dosages and for periods of time necessary, to achieve a desired therapeutic result, such as for treatment of a disease, condition, or disorder, and/or pharmacokinetic or pharmacodynamic effect of the treatment. The therapeutically effective amount may vary according to factors such as the disease state, age, sex, and weight of the subject, and the immunomodulatory polypeptides or engineered cells administered. In some embodiments, the provided methods involve administering the immunomodulatory polypeptides, engineered cells, or compositions at effective amounts, e.g., therapeutically effective amounts. 
     A “prophylactically effective amount” refers to an amount effective, at dosages and for periods of time necessary, to achieve the desired prophylactic result. Typically but not necessarily, since a prophylactic dose is used in subjects prior to or at an earlier stage of disease, the prophylactically effective amount will be less than the therapeutically effective amount. 
     The disease or condition that is treated can be any in which expression of an antigen is associated with and/or involved in the etiology of a disease condition or disorder, e.g. causes, exacerbates or otherwise is involved in such disease, condition, or disorder. Exemplary diseases and conditions can include diseases or conditions associated with malignancy or transformation of cells (e.g. cancer), autoimmune or inflammatory disease, or an infectious disease, e.g. caused by a bacterial, viral or other pathogen. Exemplary antigens, which include antigens associated with various diseases and conditions that can be treated, are described above. In particular embodiments, the immunomodulatory polypeptide and/or recombinant receptor, e.g., the chimeric antigen receptor or transgenic TCR, specifically binds to an antigen associated with the disease or condition. 
     In some embodiments, the disease or condition is a tumor, such as a solid tumor, lymphoma, leukemia, blood tumor, metastatic tumor, or other cancer or tumor type. 
     In some embodiments, the disease or condition is an infectious disease or condition, such as, but not limited to, viral, retroviral, bacterial, and protozoal infections, immunodeficiency, Cytomegalovirus (CMV), Epstein-Barr virus (EBV), adenovirus, BK polyomavirus. In some embodiments, the disease or condition is an autoimmune or inflammatory disease or condition, such as arthritis, e.g., rheumatoid arthritis (RA), Type I diabetes, systemic lupus erythematosus (SLE), inflammatory bowel disease, psoriasis, scleroderma, autoimmune thyroid disease, Grave&#39;s disease, Crohn&#39;s disease, multiple sclerosis, asthma, and/or a disease or condition associated with transplant. 
     In some embodiments, the antigen associated with the disease or disorder is selected from the group consisting of orphan tyrosine kinase receptor ROR1, tEGFR, Her2, L1-CAM, CD19, CD20, CD22, mesothelin, CEA, and hepatitis B surface antigen, anti-folate receptor, CD23, CD24, CD30, CD33, CD38, CD44, EGFR, EGP-2, EGP-4, 0EPHa2, ErbB2, 3, or 4, FBP, fetal acetylcholine receptor, GD2, GD3, HMW-MAA, IL-22R-alpha, IL-13R-alpha2, kdr, kappa light chain, Lewis Y, L1-cell adhesion molecule, MAGE-A1, mesothelin, MUC1, MUC16, PSCA, NKG2D Ligands, NY-ESO-1, MART-1, gp100, oncofetal antigen, TAG72, VEGF-R2, carcinoembryonic antigen (CEA), prostate specific antigen, PSMA, Her2/neu, estrogen receptor, progesterone receptor, ephrinB2, CD123, CS-1, c-Met, GD-2, and MAGE A3, CE7, Wilms Tumor 1 (WT-1), a cyclin, such as cyclin A1 (CCNA1), and/or biotinylated molecules, and/or molecules expressed by HIV, HCV, HBV or other pathogens. 
     The provided methods and uses include methods and uses for adoptive cell therapy. In some embodiments, the methods include administration of the engineered cells or a composition containing the cells to a subject, tissue, or cell, such as one having, at risk for, or suspected of having the disease, condition or disorder. In some embodiments, the cells, populations, and compositions are administered to a subject having the particular disease or condition to be treated, e.g., via adoptive cell therapy, such as adoptive T cell therapy. In some embodiments, the cells or compositions are administered to the subject, such as a subject having or at risk for the disease or condition, ameliorate one or more symptom of the disease or condition. 
     In some embodiments, the cell therapy, e.g., adoptive T cell therapy, is carried out by autologous transfer, in which the cells are isolated and/or otherwise prepared from the subject who is to receive the cell therapy, or from a sample derived from such a subject. Thus, in some aspects, the cells are derived from a subject, e.g., patient, in need of a treatment and the cells, following isolation and processing are administered to the same subject. 
     In some embodiments, the cell therapy, e.g., adoptive T cell therapy, is carried out by allogeneic transfer, in which the cells are isolated and/or otherwise prepared from a subject other than a subject who is to receive or who ultimately receives the cell therapy, e.g., a first subject. In such embodiments, the cells then are administered to a different subject, e.g., a second subject, of the same species. In some embodiments, the first and second subjects are genetically identical. In some embodiments, the first and second subjects are genetically similar. In some embodiments, the second subject expresses the same HLA class or super type as the first subject. The cells can be administered by any suitable means. Dosing and administration may depend in part on whether the administration is brief or chronic. Various dosing schedules include but are not limited to single or multiple administrations over various time-points, bolus administration, and pulse infusion. 
     In certain embodiments, the cells, or individual populations of sub-types of cells, are administered to the subject at a range of about one million to about 100 billion cells and/or that amount of cells per kilogram of body weight, such as, e.g., 1 million to about 50 billion cells (e.g., about 5 million cells, about 25 million cells, about 500 million cells, about 1 billion cells, about 5 billion cells, about 20 billion cells, about 30 billion cells, about 40 billion cells, or a range defined by any two of the foregoing values), such as about 10 million to about 100 billion cells (e.g., about 20 million cells, about 30 million cells, about 40 million cells, about 60 million cells, about 70 million cells, about 80 million cells, about 90 million cells, about 10 billion cells, about 25 billion cells, about 50 billion cells, about 75 billion cells, about 90 billion cells, or a range defined by any two of the foregoing values), and in some cases about 100 million cells to about 50 billion cells (e.g., about 120 million cells, about 250 million cells, about 350 million cells, about 450 million cells, about 650 million cells, about 800 million cells, about 900 million cells, about 3 billion cells, about 30 billion cells, about 45 billion cells) or any value in between these ranges and/or per kilogram of body weight. Dosages may vary depending on attributes particular to the disease or disorder and/or patient and/or other treatments. 
     In some embodiments, for example, where the subject is a human, the dose includes fewer than about 1×10 8  total recombinant receptor (e.g., CAR)-expressing cells, T cells, or peripheral blood mononuclear cells (PBMCs), e.g., in the range of about 1×10 6  to 1×10 8  such cells, such as 2×10 6 , 5×10 6 , 1×10 7 , 5×10 7 , or 1×10 8  or total such cells, or the range between any two of the foregoing values. 
     In some embodiments, the cells are administered as part of a combination treatment, such as simultaneously with or sequentially with, in any order, another therapeutic intervention, such as an antibody or engineered cell or receptor or agent, such as a cytotoxic or therapeutic agent. The cells in some embodiments are co-administered with one or more additional therapeutic agents or in connection with another therapeutic intervention, either simultaneously or sequentially in any order. In some contexts, the cells are co-administered with another therapy sufficiently close in time such that the cell populations enhance the effect of one or more additional therapeutic agents, or vice versa. In some embodiments, the cells are administered prior to the one or more additional therapeutic agents. In some embodiments, the cells are administered after the one or more additional therapeutic agents. In some embodiments, the one or more additional agents include a cytokine, such as IL-2, for example, to enhance persistence. In some embodiments, the methods comprise administration of a chemotherapeutic agent. 
     Following administration of the cells, the biological activity of the engineered cell populations in some embodiments is measured, e.g., by any of a number of known methods. Parameters to assess include specific binding of an engineered or natural T cell or other immune cell to antigen, in vivo, e.g., by imaging, or ex vivo, e.g., by ELISA or flow cytometry. In certain embodiments, the ability of the engineered cells to destroy target cells can be measured using any suitable method known in the art, such as cytotoxicity assays described in, for example, Kochenderfer et al., J. Immunotherapy, 32(7): 689-702 (2009), and Herman et al. J. Immunological Methods, 285(1): 25-40 (2004). In certain embodiments, the biological activity of the cells is measured by assaying expression and/or secretion of one or more cytokines, such as CD 107a, IFNγ, IL-2, and TNF. In some aspects the biological activity is measured by assessing clinical outcome, such as reduction in tumor burden or load. 
     In certain embodiments, the engineered cells are further modified in any number of ways, such that their therapeutic or prophylactic efficacy is increased. For example, the engineered CAR or TCR expressed by the population can be conjugated either directly or indirectly through a linker to a targeting moiety. The practice of conjugating compounds, e.g., the CAR or TCR, to targeting moieties is known in the art. See, for instance, Wadwa et al., J. Drug Targeting 3: 1 1 1 (1995), and U.S. Pat. No. 5,087,616. 
     V. DEFINITIONS 
     As used herein, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. For example, “a” or “an” means “at least one” or “one or more.” It is understood that aspects and variations described herein include “consisting” and/or “consisting essentially of” aspects and variations. 
     Throughout this disclosure, various aspects of the claimed subject matter are presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the claimed subject matter. Accordingly, the description of a range should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, where a range of values is provided, it is understood that each intervening value, between the upper and lower limit of that range and any other stated or intervening value in that stated range is encompassed within the claimed subject matter. The upper and lower limits of these smaller ranges may independently be included in the smaller ranges, and are also encompassed within the claimed subject matter, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the claimed subject matter. This applies regardless of the breadth of the range. 
     The term “about” as used herein refers to the usual error range for the respective value readily known to the skilled person in this technical field. Reference to “about” a value or parameter herein includes (and describes) embodiments that are directed to that value or parameter per se. For example, description referring to “about X” includes description of “X”. 
     As used herein, a composition refers to any mixture of two or more products, substances, or compounds, including cells. It may be a solution, a suspension, liquid, powder, a paste, aqueous, non-aqueous or any combination thereof. 
     As used herein, a statement that a cell or population of cells is “positive” for a particular marker refers to the detectable presence on or in the cell of a particular marker, typically a surface marker. When referring to a surface marker, the term refers to the presence of surface expression as detected by flow cytometry, for example, by staining with an antibody that specifically binds to the marker and detecting said antibody, wherein the staining is detectable by flow cytometry at a level substantially above the staining detected carrying out the same procedure with an isotype-matched control under otherwise identical conditions and/or at a level substantially similar to that for cell known to be positive for the marker, and/or at a level substantially higher than that for a cell known to be negative for the marker. 
     As used herein, a statement that a cell or population of cells is “negative” for a particular marker refers to the absence of substantial detectable presence on or in the cell of a particular marker, typically a surface marker. When referring to a surface marker, the term refers to the absence of surface expression as detected by flow cytometry, for example, by staining with an antibody that specifically binds to the marker and detecting said antibody, wherein the staining is not detected by flow cytometry at a level substantially above the staining detected carrying out the same procedure with an isotype-matched control under otherwise identical conditions, and/or at a level substantially lower than that for cell known to be positive for the marker, and/or at a level substantially similar as compared to that for a cell known to be negative for the marker. 
     The term “expression”, as used herein, refers to the process by which a polypeptide is produced based on the encoding sequence of a nucleic acid molecule, such as a gene. The process may include transcription, post-transcriptional control, post-transcriptional modification, translation, post-translational control, post-translational modification, or any combination thereof. 
     As used herein, a subject includes any living organism, such as humans and other mammals. Mammals include, but are not limited to, humans, and non-human animals, including farm animals, sport animals, rodents and pets. 
     As used herein, a control refers to a sample that is substantially identical to the test sample, except that it is not treated with a test parameter, or, if it is a plasma sample, it can be from a normal volunteer not affected with the condition of interest. A control also can be an internal control. 
     As used herein, “operably linked” or “operatively linked” refers to the association of components, such as a DNA sequence, e.g. a heterologous nucleic acid) and a regulatory sequence(s), in such a way as to permit gene expression when the appropriate molecules (e.g. transcriptional activator proteins) are bound to the regulatory sequence. Hence, it means that the components described are in a relationship permitting them to function in their intended manner. 
     As used herein, “percent (%) sequence identity” and “percent identity” when used with respect to a nucleotide sequence (reference nucleotide sequence) or amino acid sequence (reference amino acid sequence) is defined as the percentage of nucleotide residues or amino acid residues, respectively, in a candidate sequence that are identical with the residues in the reference sequence, after aligning the sequences and introducing gaps, if necessary, to achieve the maximum percent sequence identity. Alignment for purposes of determining percent sequence identity can be achieved in various ways that are within the skill in the art, for instance, using publicly available computer software such as BLAST, BLAST-2, ALIGN or Megalign (DNASTAR) software. Those skilled in the art can determine appropriate parameters for aligning sequences, including any algorithms needed to achieve maximal alignment over the full length of the sequences being compared. 
     The term “vector,” as used herein, refers to a nucleic acid molecule capable of propagating another nucleic acid to which it is linked. The term includes the vector as a self-replicating nucleic acid structure as well as the vector incorporated into the genome of a host cell into which it has been introduced. Certain vectors are capable of directing the expression of nucleic acids to which they are operatively linked. Such vectors are referred to herein as “expression vectors.” Among the vectors are viral vectors, such as lentiviral vectors. 
     Unless defined otherwise, all terms of art, notations and other technical and scientific terms or terminology used herein are intended to have the same meaning as is commonly understood by one of ordinary skill in the art to which the claimed subject matter pertains. In some cases, terms with commonly understood meanings are defined herein for clarity and/or for ready reference, and the inclusion of such definitions herein should not necessarily be construed to represent a substantial difference over what is generally understood in the art. 
     All publications, including patent documents, scientific articles and databases, referred to in this application are incorporated by reference in their entirety for all purposes to the same extent as if each individual publication were individually incorporated by reference. If a definition set forth herein is contrary to or otherwise inconsistent with a definition set forth in the patents, applications, published applications and other publications that are herein incorporated by reference, the definition set forth herein prevails over the definition that is incorporated herein by reference. 
     The section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described. 
     VI. EXEMPLARY EMBODIMENTS 
     Among the provided embodiments are: 
     1. An immunomodulatory polypeptide comprising:
         a) a first peptide;   b) a second peptide; and   c) a joining region connecting the first and second peptides, wherein the joining region comprises a targeting moiety that binds to a target molecule.       

     2. The immunomodulatory polypeptide of embodiment 1, wherein at least one of the first and second peptide is a cytokine or chemokine, a subunit a cytokine or chemokine, or is a functional portion of the cytokine or chemokine. 
     3. The immunomodulatory polypeptide of embodiment 1 or embodiment 2, wherein the first peptide is a cytokine or chemokine, a subunit of a cytokine or chemokine, or is a functional portion of the cytokine or chemokine. 
     4. The immunomodulatory polypeptide of any of embodiments 1-3, wherein the second peptide is a cytokine or chemokine, a subunit of a cytokine or chemokine, or is a functional portion of the cytokine or chemokine. 
     5. The immunomodulatory polypeptide of any of embodiments 1-4, wherein both the first and second peptide are independently a cytokine or chemokine, a subunit of a cytokine or chemokine or a functional portion of the cytokine or chemokine. 
     6. The immunomodulatory polypeptide of any of embodiments 1-5, wherein the first peptide and the second peptide are the same cytokine or chemokine, or functional portions thereof, or are the same subunit of the same cytokine or chemokine. 
     7. The immunomodulatory polypeptide of any of embodiments 1-5, wherein the first and second peptide are a different cytokine or chemokine, or functional portions thereof, or are a different subunit of the same or different cytokine or chemokine. 
     8. The immunomodulatory polypeptide of any of embodiments 1-7, wherein the first peptide is a first subunit of a cytokine or chemokine and the second peptide is a second subunit of the cytokine or chemokine. 
     9. The immunomodulatory polypeptide of any of embodiments 1-7, wherein the cytokine or chemokine is a monomer. 
     10. The immunomodulatory polypeptide of any of embodiments 1-8, wherein the first and/or second peptide independently comprise a subunit of a cytokine or chemokine that is a multimeric protein. 
     11. The immunomodulatory polypeptide of any of embodiments 1-4, wherein the first or second peptide is a tag or label. 
     12. An immunomodulatory polypeptide comprising:
         a) a first peptide comprising a first subunit of a cytokine or chemokine or a functional portion thereof;   b) a second peptide comprising a second subunit of the cytokine or chemokine or a functional portion thereof; and   c) a joining region connecting the first and second peptides, wherein the joining region comprises a targeting moiety that binds to a target molecule.       

     13. The immunomodulatory polypeptide of any of embodiments 1-8, 10 and 12, wherein the cytokine or chemokine is a homodimer or heterodimer. 
     14. The immunomodulatory polypeptide of any of embodiments 1-13, wherein the joining region further comprises at least one polypeptide linker linking the targeting moiety to the first or second peptide. 
     15. The immunomodulatory polypeptide of any of embodiments 2-14, wherein the cytokine or chemokine or subunit or functional portion thereof is selected from the group consisting of: IL-12, IL-15, IL-2, IL-18, GM-CSF, IL-7, IL-21, IFNα, IFNβ, IFNγ, IL-17, IL-23, IL-3, IL-4, IL-5, IL-6, IL-9, IL-11, IL-13, IL-27, Erythropoietin, G-CSF, Growth hormone, Prolactin, Oncostatin M, and Leukemia inhibitory factor or a subunit or functional portion thereof. 
     16. The immunomodulatory polypeptide of any of embodiments 1-15, wherein the first or second peptide independently comprises a subunit of a cytokine or chemokine selected from IL-12, IL-23, IL-27 and IL-35 or a functional portion thereof. 
     17. The immunomodulatory polypeptide of any of embodiments 1-7 and 9-16, wherein the first or second peptide is independently a subunit of IL-12 or a functional portion thereof. 
     18. The immunomodulatory polypeptide of embodiment 17, wherein the first peptide comprises an IL-12 p35 subunit or an IL-12 p40 subunit or a functional portion thereof and the second peptide comprises the other of the IL-12 p35 subunit and the IL-12 p40 subunit or a functional portion thereof. 
     19. An immunomodulatory polypeptide comprising:
         a) a first peptide comprising a p35 subunit of IL-12 or a functional portion thereof;   b) a second peptide comprising a p40 subunit of IL-12 or a functional portion thereof; and   c) a joining region connecting the first and second peptides, wherein the joining region comprises a targeting moiety that binds to a target molecule.       

     20. The immunomodulatory peptide of embodiment 18 or embodiment 19, wherein the p35 subunit comprises the sequence of amino acids set forth in SEQ ID NO: 10 or a sequence that has at least 95% sequence identity thereto and/or the p40 subunit comprises the sequence of amino acids set forth in SEQ ID NO: 11 or a sequence that has at least 95% sequence identity thereto. 
     21. The immunomodulatory polypeptide of any of embodiments 18-20 wherein the joining region further comprises at least one polypeptide linker linking the targeting moiety to the p35 subunit or the p40 subunit. 
     22. The immunomodulatory polypeptide of any of embodiments 14-18 and 21, wherein the polypeptide linker comprises from about 2 to about 20 amino acids. 
     23. The immunomodulatory polypeptide of any of embodiments 14-18 and 21-22, wherein the polypeptide linker comprises the sequence GGGGS(n), wherein n is 1-5 (SEQ ID NO:29). 
     24. The immunomodulatory polypeptide of embodiment 23, wherein the polypeptide linker comprises the sequence set forth in any of SEQ ID NOs: 7-9. 
     25. The immunomodulatory polypeptide of any of embodiments 1-24, wherein the joining region comprises two polypeptide linkers. 
     26. The immunomodulatory polypeptide of any of embodiments 1-25, wherein the targeting moiety is comprised between a first polypeptide linker and a second polypeptide linker. 
     27. The immunomodulatory polypeptide of any of embodiments 1-26, wherein the target molecule is associated with a disease or disorder. 
     28. The immunomodulatory polypeptide of embodiment 27, wherein the disease or disorder is an infectious disease or disorder, an autoimmune disease, an inflammatory disease, or a tumor or a cancer. 
     29. The immunomodulatory polypeptide of any of embodiments 1-28, wherein the target molecule is associated with a tumor or present on a tumor. 
     30. The immunomodulatory polypeptide of any of embodiments 1-29, wherein the target molecule is a tumor antigen. 
     31. The immunomodulatory polypeptide of any of embodiments 1-30, wherein the target molecule is selected from the group consisting of: hepatocyte growth factor (HGF), hepatocyte growth factor receptor (HGFR), heparin, VEGF, VEGF-A, VEGFR2, VEGFR3, HER2, PD-1, tenascin-C, CTLA-4, LAGS, PD-L1, EGFR, EPCAM, RANKL, NG2 proteoglycan, CD20, CD52, CD19, CD3, CD30, IL-6, CD38, SLAMF7, GD2, CD13, CD274, CD279, CD40L, and CD47. 
     32. The immunomodulatory polypeptide of any of embodiments 1-31, wherein the targeting moiety comprises from about 3 to about 300 amino acids, about 3 to about 100 amino acids, about 3 to about 20 amino acids, about 6 to about 20 amino acids, or about 10 amino acids. 
     33. The immunomodulatory polypeptide of any of embodiments 1-32, wherein the targeting moiety exhibits a k off  rate for binding the target molecule that is about 0.5×10 −4  sec −1  or greater, about 1×10 −4  sec −1  or greater, about 2×10 −4  sec −1  or greater, about 3×10 −4  sec −1  or greater, about 4×10 −4  sec −1  of greater, about 5×10 −4  sec −1  or greater, about 1×10 −3  sec −1  or greater, about 1.5×10 −3  sec −1  or greater, about 2×10 −3  sec −1  or greater, about 3×10 −3  sec −1  or greater, about 4×10 −3  sec −1 , about 5×10 −3  sec −1  or greater, about 1×10 −2  sec or greater, or about 5×10 −1  sec −1  or greater. 
     34. The immunomodulatory polypeptide of any of embodiments 1-33, wherein the targeting moiety is or comprises an antibody or antibody fragment. 
     35. The immunomodulatory polypeptide of embodiment 34, wherein the antibody fragment is a single chain fragment. 
     36. The immunomodulatory polypeptide of embodiment 34 or embodiment 35, wherein the antibody fragment is a single domain antibody comprising the variable heavy chain region. 
     37. The immunomodulatory polypeptide of embodiment 34 or embodiment 35, wherein the antibody fragment comprises antibody variable regions joined by a flexible linker. 
     38. The immunomodulatory polypeptide of any of embodiments 34-37, wherein the antibody fragment comprises an scFv. 
     39. The immunomodulatory polypeptide of any of embodiments 1-38, wherein the targeting moiety comprises a variable heavy (VH) chain and/or variable light (VL) chain of an antibody selected from the group consisting of: trastuzumab, pertuzumab, ramucirumab, atezolizumab, bevacizumab, panitumumab, cetuximab, necitumumab, denosumab, nivolumab, pembrolizumab, rituximab, ofatumumab, obinutuzumab, alemtuzumab, blinatumomab, brentuximab vedotin, siltuximab, ipilimumab, daratumumab, elotuzumab, dinutuximab, Catumaxomab. 
     40. The immunomodulatory polypeptide of any of embodiments 1-39, wherein the targeting moiety comprises a V H  chain and/or V L  chain of an anti-EPCAM antibody. 
     41. The immunomodulatory polypeptide of any of embodiments 1-40, wherein the targeting moiety comprises the sequence set forth in SEQ ID NO: 17, 24 or 25, or a sequence that has at least 95% sequence identity to SEQ ID NO: 17, 24 or 25 and binds to the target molecule. 
     42. The immunomodulatory polypeptide of any of embodiments 1-41, wherein the immunomodulatory polypeptide comprises the sequence set forth in SEQ ID NO: 6, or a sequence that has at least 95% sequence identity to such a sequence. 
     43. The immunomodulatory polypeptide of any of embodiments 1-33, wherein the targeting moiety is or comprises a peptide binding motif. 
     44. The immunomodulatory polypeptide of any of embodiments 1-33 and 43, wherein the targeting moiety is a heparin binding peptide. 
     45. The immunomodulatory polypeptide of embodiment 44, wherein the heparin binding peptide (HBP) is derived from fibronectin or BMP4, and/or is of bovine origin. 
     46. The immunomodulatory polypeptide of any of embodiments 1-33, and 43, wherein the targeting moiety is selected from the group consisting of: a hepatocyte growth factor (HGF) binding peptide, a VEGF binding peptide, a VEGF-A binding peptide, a VEGFR2 binding peptide, an EPCAM binding peptide, a HER2 binding peptide, a PD-1 binding peptide, a tenascin-C binding peptide, a CTLA-4 binding peptide, a LAGS binding peptide, a PD-L1 binding peptide, a EGFR binding peptide, a RANKL binding peptide, a CD20 binding peptide, a CD52 binding peptide, a CD19 binding peptide, a CD3 binding peptide, a CD30 binding peptide, a IL-6 binding peptide, a CD38 binding peptide, a SLAMF7 binding peptide, a GD2 binding peptide, a CD274 binding peptide, a CD279 binding peptide, a CD40L binding peptide, and a CD47 binding peptide. 
     47. The immunomodulatory polypeptide of any of embodiments 1-33, 43 and 46 wherein the targeting moiety comprises an HGF binding peptide or an EGFR binding peptide (EGFRBP). 
     48. The immunomodulatory polypeptide of any of embodiments 1-33 and 43-47 wherein the targeting moiety comprises the sequence set forth in any of SEQ ID NOs: 13, 14, 15, 16, 26, 27 or 28, or a sequence that has at least 95% sequence identity to any of SEQ ID NOs: 13, 14, 15, 16, 26, 27 or 28 and binds to the target molecule. 
     49. The immunomodulatory polypeptide of any of embodiments 1-33 and 43-48, wherein the immunomodulatory polypeptide comprises the sequence set forth in any of SEQ ID NOs: 1-5, or a sequence that has at least 95% sequence identity to any of SEQ ID NOs: 1-5. 
     50. The immunomodulatory polypeptide of any of embodiments 1-49, wherein the immunomodulatory polypeptide exhibits increased activity to stimulate via the IL-12R compared to a reference IL-12. 
     51. The immunomodulatory polypeptide of embodiment 50, wherein the reference IL-12 does not comprise a joining region or comprises a joining region that consists of the sequence set forth in any one of SEQ ID NOs 7-9. 
     52. The immunomodulatory polypeptide of any of embodiments 1-51, wherein the immunomodulatory polypeptide exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. 
     53. The immunomodulatory polypeptide of any of embodiments 50-52, wherein the increased activity and/or binding is by greater than 1.2-fold, greater than 1.5-fold, greater than 2.0-fold, greater than 3.0-fold, greater than 4.0-fold, greater than 5.0-fold or greater than 10.0-fold. 
     54. The immunomodulatory polypeptide of any of embodiments 1-53, wherein the immunomodulatory polypeptide binds one or more cognate receptor(s) with increased, decreased, or similar binding affinity as a recombinant immunomodulatory polypeptide not containing the joining region. 
     55. The immunomodulatory polypeptide of any of embodiments 1-54, wherein, the immunomodulatory polypeptide binds the one or more cognate receptor(s) with an equilibrium dissociation constant (K D ) that ranges from or from about 10 −5  M to or to about 10 −15  M, 10 −6  M to or to about 10 −12  M, from or from about 10 −7  M to or to about 10 −11  M, from or from about 10 −6  M to or to about 10 −8  M, or from or from about 10 −7  M to or to about 10 −8  M. 
     56. The immunomodulatory polypeptide of any of embodiments 1-54, wherein, the immunomodulatory polypeptide binds the one or more cognate receptor(s) with a K D  that is at or about or less than at or about 100, 50, 40, 30, 25, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.5, or 0.1 nM; or is at or about or less than at or about 1 nM, 100 picomolar (pM), 90 pM, 80 pM, 70 pM, 60 pM, 50 pM, 40 pM, 30 pM, 25 pM, 20 pM, 15 pM, 10 pM, or 1 pM. 
     57. A polynucleotide encoding the immunomodulatory polypeptide of any of embodiments 1-56. 
     58. The polynucleotide of embodiment 57, further comprising a signal sequence. 
     59. The polynucleotide of embodiment 58, wherein the signal sequence encodes a signal peptide derived from CD33. 
     60. The polynucleotide of embodiment 59, wherein the signal peptide comprises the sequence set forth in SEQ ID NO: 18, or a sequence that has at least 95% sequence identity to such a sequence. 
     61. The polynucleotide of any of embodiments 57-60, wherein the polynucleotide further comprises at least one promoter, enhancer or transactivator that is operatively linked to control expression of the immunomodulatory polypeptide. 
     62. The polynucleotide of embodiment 61, wherein the expression of the immunomodulatory polypeptide is inducible or conditional. 
     63. The polynucleotide of embodiment 61 or 62, wherein the promoter, enhancer or transactivator is a T cell activation factor. 
     64. The polynucleotide of any of embodiments 61-63, wherein the promoter, enhancer or transactivator contains a binding site for one or more T cell transcription factor(s). 
     65. The polynucleotide of embodiment 64, wherein the T cell transcription factor is nuclear factor of activated T-cells (NFAT), C/EBP, STAT1, STAT2, and/or NFκB. 
     66. The polynucleotide of embodiment 61 or embodiment 62, wherein activation of the promoter, enhancer, or transactivator is conditional, optionally an inducible promoter, enhancer, or transactivator or a repressible promoter, enhance or transactivator. 
     67. The polynucleotide of any of embodiments 61, 62, or 66, wherein the promoter, enhancer or transactivator is active in the presence of one or more conditions present in the tumor microenvironment. 
     68. The polynucleotide of embodiment 67, wherein the one or more conditions present in the tumor microenvironment is selected from hypoxia, low glucose, acidic pH or oxidative stress. 
     69. The polynucleotide of embodiment 67 or 68, wherein the one or more conditions present in the tumor microenvironment is hypoxia. 
     70. The polynucleotide of any of embodiments 61, 62, or 66-69, wherein the polynucleotide is operatively linked to a promoter, and the promoter is a HIF-1-alpha-responsive promoter. 
     71. The polynucleotide of any of embodiments 61, 62, or 66-70, wherein the polynucleotide is operatively linked to a promoter, and the promoter comprises one or more hypoxia response element. 
     72. The polynucleotide of embodiment 71, wherein the hypoxia response element comprises the sequence 5′-(A/G)CGT(G/C)(G/C)-3′. 
     73. The polynucleotide of any of embodiments 70-72, wherein the promoter is an erythropoietin (Epo), VEGF-A, phosphoglycerate kinase 1 (PGK1), lactate dehydrogenase A (LDH A), aldolase A (ALDA) or glyceraldehyde 3-phosphate dehydrogenase (GAPDH) promoter. 
     74. The polynucleotide of embodiment 73 wherein the promoter is set forth in any of SEQ ID NOs: 85-90. 
     75. The polynucleotide of embodiment 67 or 68, wherein the one or more conditions present in the tumor micorenvironment is low glucose. 
     76. The polynucleotide of any of embodiments 61, 62, 66-68, or 75, wherein the polynucleotide is operatively linked to a promoter that is a GRP78 or hexokinase II promoter. 
     77. The polynucleotide of any of embodiments 61, 62, or 66, wherein the promoter, enhancer, or transactivator is inducible by radiation, heat or in the presence of a drug. 
     78. The polynucleotide of embodiment 77, wherein the promoter is a radiation-inducible promoter. 
     79. The polynucleotide of embodiment 77, wherein the radiation-inducible promoter comprises a CArG element or a CC(A+T rich) 6 GG motif. 
     80. The polynucleotide of embodiment 78 or 79, wherein the radiation-inducible promoter is an EGR-1, Waf-1, RecA, or cIAP2 promoter or is a synthetic promoter. 
     81. The polynucleotide of any of embodiments 78-80, wherein the radiation-inducible promoter is a synthetic promoter that comprises the any of the sequences set forth in SEQ ID NOs 92-95. 
     82. The polynucleotide of embodiment 77, wherein the promoter, enhancer or transactivator is heat-inducible promoter, enhancer or transactivator. 
     83. The polynucleotide of embodiment 82, wherein the heat-inducible promoter, enhancer, or transactivator comprises a heat shock element (HSE). 
     84. The polynucleotide of embodiment 83, wherein the heat-inducible promoter, enhancer, or transactivator is a heat shock promoter (HSP). 
     85. The polynucleotide of embodiment 84h, wherein the HSP is an HSP70B promoter. 
     86. The polynucleotide of embodiment 73, wherein the heat-inducible promoter, enhancer, or transactivator is a Gadd 153 promoter. 
     87. The polynucleotide of embodiment 77, wherein the promoter, enhancer, or transactivator is a drug-inducible promoter, enhancer, or transactivator. 
     88. The polynucleotide of embodiment 66 or embodiment 87, wherein the inducible promoter, enhancer, or transactivator comprises a Lac operator sequence, a tetracycline operator sequence, a galactose operator sequence or a doxycycline operator sequence, a rapamycin operator sequence, a tamoxifen operator sequence, or a hormone-responsive operator sequence, or an analog thereof. 
     89. The polynucleotide of any of embodiments 66, 87 or 88, wherein the inducible promoter comprises a tetracycline response element (TRE). 
     90. The polynucleotide of embodiment 87, wherein the drug-inducible promoter, enhancer, or transactivator comprises a multidrug resistance (mdr1) gene promoter. 
     91. The polynucleotide of any of embodiments 57-90, wherein the polynucleotide comprises a single nucleic acid sequence. 
     92. The polynucleotide of any of embodiments 57-90, comprising a first nucleic acid sequence encoding the immunomodulatory polypeptide and a second nucleic acid sequence encoding a recombinant receptor. 
     93. The polynucleotide of embodiment 92, wherein the recombinant receptor is or comprises a chimeric antigen receptor (CAR). 
     94. The polynucleotide of embodiment 92 or embodiment 93, further comprising at least one promoter that is operatively linked to control expression of the immunomodulatory polypeptide and/or the recombinant receptor. 
     95. The polynucleotide of any of embodiments 92-94, further comprising an internal ribosome entry site (IRES) or a nucleic acid sequence encoding a linking peptide between the first and second nucleic acid sequences, wherein the linking peptide separates the translation products of the first and second nucleic acid sequences during or after translation. 
     96. The polynucleotide of embodiment 95, wherein the linking peptide comprises a self-cleaving peptide, or a peptide that causes ribosome skipping, optionally a T2A peptide. 
     97. The polynucleotide of any of embodiments 57-96 that is optimized to remove CpG motifs and/or is codon-optimized. 
     98. The polynucleotide of embodiment 97, that is human codon-optimized. 
     99. A vector, comprising the polynucleotide of any of embodiments 57-98. 
     100. The vector of embodiment 99 that is a viral vector. 
     101. The vector of embodiment 99 or embodiment 100 that is a retroviral vector. 
     102. The vector of any of embodiments 99-101 that is a lentiviral vector or a gammaretroviral vector. 
     103. An engineered cell comprising the immunomodulatory polypeptide of any of embodiments 1-56. 
     104. An engineered cell comprising the polynucleotide of any of embodiments 57-98. 
     105. An engineered cell comprising the vector of any of embodiments 99-102. 
     106. The engineered cell of any of embodiments 103-105, wherein the engineered cell secretes the immunomodulatory polypeptide. 
     107. The engineered cell of any of embodiments 103-106, further comprising a recombinant receptor. 
     108. The engineered cell of embodiment 107, wherein the recombinant receptor binds to a target antigen that is associated with a disease or disorder. 
     109. The engineered cell of embodiment 108, wherein the disease or disorder is an infectious disease or disorder, an autoimmune disease, an inflammatory disease, or a tumor or a cancer. 
     110. The engineered cell of embodiment 108 or embodiment 109, wherein the target antigen is a tumor antigen. 
     111. The engineered cell of any of embodiments 108-110, wherein the target antigen is selected from the group consisting of ROR1, Her2, L1-CAM, CD19, CD20, CD22, mesothelin, CEA, hepatitis B surface antigen, anti-folate receptor, CD23, CD24, CD30, CD33, CD38, CD44, EGFR, EGP-2, EGP-4, EPHa2, ErbB2, ErbB3, ErbB4, FBP, fetal acetylcholine receptor, GD2, GD3, HMW-MAA, IL-22R-alpha, IL-13R-alpha2, kdr, kappa light chain, Lewis Y, L1-cell adhesion molecule, MAGE-A1, mesothelin, MUC1, MUC16, PSCA, NKG2D Ligands, NY-ESO-1, MART-1, gp100, oncofetal antigen, TAG72, VEGF-R2, VEGFR3, carcinoembryonic antigen (CEA), prostate specific antigen, PSMA, estrogen receptor, progesterone receptor, ephrinB2, CD123, CS-1, c-Met, GD-2, MAGE A3, CE7, Wilms Tumor 1 (WT-1), and cyclin A1 (CCNA1). 
     112 The engineered cell of any of embodiments 103-111, wherein the targeting moiety is human or is derived from a human protein. 
     113. The engineered cell of any of embodiments 103-112, wherein the immunomodulatory protein is not immunogenic and/or does not induce an immune response in a subject in which it is administered. 
     114. The engineered cell of any of embodiments 107-113, wherein the recombinant receptor is a functional non-TCR antigen receptor or a transgenic TCR. 
     115. The engineered cell of any of embodiments 107-114, wherein the recombinant receptor is a chimeric antigen receptor (CAR). 
     116. The engineered cell of any of embodiments 107-115, wherein the recombinant receptor comprises an extracellular portion comprising an antigen-binding domain. 
     117. The engineered cell of embodiment 116, wherein the antigen-binding domain is or comprises an antibody or an antibody fragment. 
     118. The engineered cell of embodiment 117, wherein the antibody fragment is a single chain fragment. 
     119. The engineered cell of embodiment 117 or embodiment 118, wherein the fragment comprises antibody variable regions joined by a flexible linker. 
     120. The engineered cell of any of embodiments 117-119, wherein the fragment comprises an scFv. 
     121. The engineered cell of any of embodiments 107-120, wherein the recombinant receptor comprises an intracellular signaling region. 
     122. The engineered cell of embodiment 121, wherein the intracellular signaling region comprises an intracellular signaling domain. 
     123. The engineered cell of embodiment 122, wherein the intracellular signaling domain is or comprises a primary signaling domain, a signaling domain that is capable of inducing a primary activation signal in a T cell, a signaling domains of a T cell receptor (TCR) component, and/or a signaling domain comprising an immunoreceptor tyrosine-based activation motif (ITAM). 
     124. The engineered cell of embodiment 122, wherein the intracellular signaling domain is or comprises an intracellular signaling domain of a CD3 chain, optionally a CD3-zeta (CD3) chain, or a signaling portion thereof. 
     125. The engineered cell of any of embodiments 122-124, further comprising a transmembrane domain disposed between the extracellular portion and the intracellular signaling region. 
     126. The engineered cell of any of embodiments 122-125, wherein the intracellular signaling region further comprises a costimulatory signaling domain. 
     127. The engineered cell of embodiment 126, wherein the costimulatory signaling domain comprises an intracellular signaling domain of a T cell costimulatory molecule or a signaling portion thereof. 
     128. The engineered cell of embodiment 126 or embodiment 127, wherein the costimulatory signaling domain comprises an intracellular signaling domain of a CD28, a 4-1BB or an ICOS, or a signaling portion thereof. 
     129. The engineered cell of any of embodiments 126-128, wherein the costimulatory signaling domain is between the transmembrane domain and the intracellular signaling domain. 
     130. The engineered cell of any of embodiments 103-129, wherein the engineered cell is a T cell. 
     131. The engineered cell of any of embodiments 103-130 that is a CD8+ T cell or a CD4+ T cell. 
     132. The engineered cell of any of embodiments 103-131, wherein the engineered cell exhibits increased persistence and/or survival compared to cells not engineered or compared to cells comprising a recombinant receptor but not the immunomodulatory polypeptide. 
     133. The engineered cell of any of embodiments 103-132, wherein the engineered cell exhibits increased activity to stimulate via the IL-12R compared to a reference IL-12. 
     134. The engineered cell of embodiment 133, wherein the reference IL-12 does not comprise a joining region or comprises a joining region that consists of any of the sequences set forth in SEQ ID NOs 7-9. 
     135. The engineered cell of any of embodiments 103-134, wherein the engineered cell secretes an immunomodulatory polypeptide that exhibits increased binding to a target cell expressing the target molecule as compared with its binding to a cell not expressing the target molecule. 
     136. The engineered cell of any of embodiments 103-135, wherein the engineered cell effects increased killing of a target cell expressing the target molecule compared to killing of cells not expressing the target molecule. 
     137. The engineered cell of any of embodiments 132-136, wherein the increased persistence, activity, binding, and/or killing is greater than effected by a reference engineered cell expressing or secreting an immunomodulatory polypeptide comprising a polypeptide linker between subunits but not comprising the targeting moiety. 
     138. A composition comprising the immunomodulatory polypeptide of any of embodiments 1-56. 
     139. A composition comprising the engineered cell of any of embodiments 103-137. 
     140. The composition of embodiment 138 or embodiment 139, further comprising a pharmaceutically acceptable excipient. 
     141. A method of treatment comprising administering the immunomodulatory polypeptide of any of embodiments 1-56 the engineered cell of any of embodiments 103-137, or the composition of any of embodiments 138-140 to a subject having a disease or disorder. 
     142. The method of embodiment 141, wherein the immunomodulatory polypeptide specifically binds to a target molecule expressed by a cell associated with the disease or disorder. 
     143. The method of treatment of embodiment 141 or embodiment 142, wherein the engineered cell expresses a recombinant receptor that specifically binds to an antigen associated with the disease or condition. 
     144. The method of any of embodiments 141-143, wherein the disease or disorder is a cancer, a tumor, an autoimmune disease or disorder, or an infectious disease. 
     VII. EXAMPLES 
     The following examples are included for illustrative purposes only and are not intended to limit the scope of the invention. 
     Example 1: Design of IL-12 Immunomodulatory Polypeptides 
     Single chain IL-12 (scIL-12) immunomodulatory polypeptides were designed that included one or more targeting moieties that specifically bind to a particular target molecule or motif, for example, for use in targeting, localizing, or orienting the polypeptide in or near or in a particular orientation with respect to a cell expressing the target molecule or motif. The constructs were synthesized as single-chain sequences encoding the p35 subunit (set forth in SEQ ID NO:10) and p40 subunit (set forth in SEQ ID NO: 11) of IL-12 joined by a polypeptide linker containing the targeting moiety and, optionally, one or more G4S(3) peptide linkers (SEQ ID NO:7) joining the targeting moiety to the IL-12 subunits. 
     Table 3 sets forth the sequences of exemplary IL-12 immunomodulatory polypeptides containing various targeting moieties derived from either: a heparin binding peptide of BMP4 (HBP BMP4; SEQ ID NO:13), a heparin binding peptide of fibronectin (HBP FBN, SEQ ID NO:14), a hepatocyte growth factor binding peptide (HGFBP, SEQ ID NO:15), an epidermal growth factor receptor binding peptide (EGFRBP; SEQ ID NO:16) or an anti-EPCAM scFv antibody (SEQ ID NO:17). A control polypeptide in which the polypeptide linker contained a G4S(3) linker alone (set forth in SEQ ID NO:9) and no targeting moiety joining the subunits also was designed (designated scIL-12). Each sequence also was designed to encode an N-terminal signal sequence derived from CD33 (MPLLLLLPLLWAGALAM, SEQ ID NO:18) for secretion of the immunomodulatory protein when expressed in a cell. In some cases, one or more tags were included at the C-terminus (e.g. 6×His-tag, SEQ ID NO:20 or Strep-Tag® II, SEQ ID NO:21). 
     
       
         
           
               
             
               
                 TABLE 3 
               
             
            
               
                   
               
               
                 Exemplary IL-12 Immunomodulatory Polypeptides 
               
            
           
           
               
               
               
               
            
               
                   
                 Targeting 
                   
                 SEQ 
               
               
                   
                 moiety/ 
                   
                 ID 
               
               
                 Name 
                 moieties 
                 Sequence 
                 NO. 
               
               
                   
               
               
                 scIL-12 
                 None 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 1 
               
               
                   
                   
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                   
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSGGGGSGGGGSRNLPVATPDPGMFPCLHHSQNLLRAVSNMLQ 
                   
               
               
                   
                   
                 KARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTKNESCL 
                   
               
               
                   
                   
                 NSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEFKTM 
                   
               
               
                   
                   
                 NAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSLEE 
                   
               
               
                   
                   
                 PDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 scIL-12- 
                 HBP, 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 2 
               
               
                 HBP 
                 BMP4 
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                 BMP4 
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSRKKNPNCRRHGGGGSRNLPVATPDPGMFPCLHHSQNLLRAV 
                   
               
               
                   
                   
                 SNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTK 
                   
               
               
                   
                   
                 NESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQV 
                   
               
               
                   
                   
                 EFKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQK 
                   
               
               
                   
                   
                 SSLEEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 scIL-12- 
                 HBP FBN 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 3 
               
               
                 HBP 
                   
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                 FBN 
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSKNNQKSEPLIGRKKTGGGGSRNLPVATPDPGMFPCLHHSQN 
                   
               
               
                   
                   
                 LLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLP 
                   
               
               
                   
                   
                 LELTKNESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDL 
                   
               
               
                   
                   
                 KMYQVEFKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSE 
                   
               
               
                   
                   
                 TVPQKSSLEEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 scIL-12- 
                 HGFBP 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 4 
               
               
                 HGFBP 
                   
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                   
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSVWNWVCFRDVGCDWVLGGGGSRNLPVATPDPGMFPCLHHSQ 
                   
               
               
                   
                   
                 NLLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACL 
                   
               
               
                   
                   
                 PLELTKNESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYED 
                   
               
               
                   
                   
                 LKMYQVEFKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNS 
                   
               
               
                   
                   
                 ETVPQKSSLEEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNA 
                   
               
               
                   
                   
                 S 
                   
               
               
                   
               
               
                 scIL-12- 
                 EGFRBP 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 5 
               
               
                 EGFRBP 
                   
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                   
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSSVDNPHVCGGGGSRNLPVATPDPGMFPCLHHSQNLLRAVSN 
                   
               
               
                   
                   
                 MLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTKNE 
                   
               
               
                   
                   
                 SCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEF 
                   
               
               
                   
                   
                 KTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSS 
                   
               
               
                   
                   
                 LEEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 scIL-12- 
                 Anti 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSS 
                 6 
               
               
                 Anti 
                 EPCAM 
                 EVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDG 
                   
               
               
                 EPCAM 
                   
                 IWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTF 
                   
               
               
                   
                   
                 SVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSA 
                   
               
               
                   
                   
                 CPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQ 
                   
               
               
                   
                   
                 LKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKK 
                   
               
               
                   
                   
                 DRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCSGG 
                   
               
               
                   
                   
                 GGSQVQLVQSGAEVKKPGSSVKVSCKASGGTFSSYAISVVVRQA 
                   
               
               
                   
                   
                 PGQGLEWMGGIIPIFGTANYAQKFQGRVTITADESTSTAYMELS 
                   
               
               
                   
                   
                 SLRSEDTAVYYCARGLLWNYWGQGTLVTVSSKLSGSASAPKLEE 
                   
               
               
                   
                   
                 GEFSEARVETTLTQSPATLSVSPGERATLSCRASQSVSSNLAVV 
                   
               
               
                   
                   
                 YQQKPGQAPRLLIYGASTRATGIPARFSGSGSGTEFTLTISSLQ 
                   
               
               
                   
                   
                 SEDFAVYYCQQYNNWPPGFTFGPGTKVDIKGGGGSRNLPVATPD 
                   
               
               
                   
                   
                 PGMFPCLHHSQNLLRAVSNMLQKARQTLEFYPCTSEEIDHEDIT 
                   
               
               
                   
                   
                 KDKTSTVEACLPLELTKNESCLNSRETSFITNGSCLASRKTSFM 
                   
               
               
                   
                   
                 MALCLSSIYEDLKMYQVEFKTMNAKLLMDPKRQIFLDQNMLAVI 
                   
               
               
                   
                   
                 DELMQALNFNSETVPQKSSLEEPDFYKTKIKLCILLHAFRIRAV 
                   
               
               
                   
                   
                 TIDRVMSYLNAS 
               
               
                   
               
            
           
         
       
     
     Example 2: Assessment of IL-12-Mediated Cell Stimulation by the Immunomodulatory Polypeptides 
     Exemplary IL-12 immunomodulatory polypeptides, scIL-12-HBP FBN (SEQ ID NO:3) and scIL-12-EGFRBP (SEQ ID NO:5), as described in Example 1, were tested for activity to stimulate secretion of cytokines from cells expressing the IL-12 receptor (IL-12R). As a control, scIL-12 (SEQ ID NO:1) that did not contain an integrated targeting moiety in its linker or recombinant human IL-12 (rHuIL-12) (R&amp;D Systems) were used as controls. 
     Peripheral blood mononuclear cells (PBMCs) were stimulated with phytohemagglutinin (PHA) to generate PHA blasts in order to upregulate surface expression of the IL-12 receptor (IL-12R). PHA blasts were stimulated with increased concentrations of the various immunomodulatory polypeptides or controls at concentrations ranging from 0-25 ng/mL. At 24 hours and 72 hours post-stimulation of cells, supernatant was collected and measured for interferon gamma (IFNγ) of GM-CSF by ELISA. The results are shown in  FIG. 1 . 
     As shown in  FIG. 1 , a dose-dependent increase in IFNγ and GM-CSF was observed following stimulation of the PHA blasts with the IL-12 immunomodulatory polypeptides or controls. At 24 hours post-stimulation, PHA blasts treated with the test polypeptides scIL-12-HBP FBN and scIL-12-EGFRBP as well as the scIL-12 control polypeptide displayed similar levels of IFNγ and GM-CSF as those treated with rHuIL-12 across the various concentrations. However, at 72 hours post-stimulation, the levels of IFNγ and GM-CSF were substantially higher in PHA blasts stimulated with each of the single chain polypeptides (scIL-12-HBP FBN, scIL-12-EGFRBP or sc IL-12 G4S(3) polypeptides) compared to PHA blasts stimulated with rHuIL-12. The results demonstrated that single chain forms of IL-12 immunomodulatory polypeptides comprising the p35 and p40 subunits joined by a polypeptide linker, and optionally comprising a targeting moiety, may be more potent immune cell activators than rHuIL-12. 
     Example 3: Assessment of T Cell Proliferation Following Stimulation with IL-12 Immunomodulatory Polypeptides 
     T cells were isolated by immunoaffinity-based enrichment from three human donor subjects and cells from each donor were activated and transduced with a viral vector encoding an anti-CD19 CAR. The CAR contained an anti-CD19 scFv, an Ig-derived spacer, a human CD28-derived transmembrane domain, a human 4-1BB-derived intracellular signaling domain and a human CD3 zeta-derived signaling domain. CD19-expressing target cells (K562 cells transduced to express CD19, K562-CD19) at 20,000 cells per well in triplicate in a 96-well poly-D-lysine-coated plate were incubated with the various CAR-expressing T cells (at various effector:target ratios (5:1, 2.5:1, 1:1), alone or in the presence of the exemplary scIL-12-HBP FBN (SEQ ID NO:3) immunomodulatory polypeptide described in Example 1 (either at 0.5 ng/mL or 5 ng/mL). Incubation in the presence of target cells without the scIL2 was used as an “untreated” control. 
     The fold change in total number of cells at Day 0 prior to stimulation compared to Day 5 post-stimulation was determined. As shown in  FIG. 2 , a greater increase in cell number was observed in the cells treated in the presence of the scIL-12-HBP FBN, at 0.5 or 5 ng/mL, compared to untreated control cells, at all E:T ratios tested, consistent with the ability of the immunomodulatory polypeptide to enhance cell proliferation and/or survival in the presence of antigen-expressing target cells. 
     Example 4: T Cell Killing Activity Following Exposure to IL-12 Immunomodulatory Polypeptides 
     CD19-expressing K562-CD19 target cells were co-cultured with anti-CD19-CAR-expressing T cells at various E:T ratios including 5:1, 2.5:1 and 1:1 as described in Example 3. The co-cultures were incubated in the presence of scIL-12-HBP FBN (SEQ ID NO:3) as described in Example 1 at 0.5 or 5 ng/mL or were left untreated. Cell lysis was monitored in real-time over a 0 to about 110-hour time course by adding an IncuCyte™ fluorescent Caspase 3/7 Reagent to the co-cultures to detect cells apoptotic cells. Target cell death was quantitated by automated image analysis over time. The area under the curve (AUC) of fluorescent signal over time for each concentration was determined. A killing index was determined using the formula: 1/AUC. 
       FIG. 3  sets forth the killing index for each tested condition. As shown in  FIG. 3 , stimulation of cells in the presence of scIL-12-HBP FBN polypeptides enhanced T cell killing of target cells at all of the E:T ratios as compared to the control, untreated cells. 
     Example 5: Binding to IL-12 Receptor (IL-12Rb) 
     Exemplary single chain IL-12 (scIL-12) immunomodulatory polypeptides, scIL-12-G4S (SEQ ID NO:1), scIL-12-HBP FBN (SEQ ID NO:3), and scIL-12-EGFRBP (SEQ ID NO:5), as described in Example 1, were tested for functional binding to the beta subunit of the IL-12 Receptor (IL-12Rb) by surface plasmon resonance. ROR1-Fc was also assessed for binding to IL-12Rb as a negative control. An anti-hIgG capture chip was used to immobilize IL-12Rb-hIgG1 Fc (purchased from R&amp;D Systems). Approximately 30 nM scIL-12 molecules were flowed over the immobilized IL-12Rb to assess binding using a Biacore surface plasmon resonance instrument. The results are shown in  FIG. 4 . The results show that scIL-12 containing a linker sequence alone (G4S) or linkers containing a targeting moiety, but not ROR1-Fc, were able to functionally bind to the IL-12 Receptor (IL-12Rb). 
     Example 6: Binding to Target Molecule-Expressing Cells 
     Exemplary scIL-12 immunomodulatory polypeptides described in Example 1 are detectably labeled and incubated with target cells known to (or engineered to) express exemplary target molecules (including heparin, EGFR or HGFR), individually capable of being bound by the targeting moiety contained within a given one of the scIL-12 immunomodulatory polypeptides. As controls, the cells also are incubated with control scIL-12 not containing the respective targeting moiety and/or rhIL-12, and/or the scIL-12 containing the targeting moiety is incubated in the presence of cells that do not express the target molecule or motif thereof recognized by the targeting moiety, or do so at lower levels. 
     Binding is assessed by flow cytometry or other methods as appropriate, and compared between the different conditions; in some aspects, increased binding in the condition involving scIL-12 with a targeting moiety as compared to one or more of the controls, indicates specificity of the engineered single-chain IL-12 reagent for target molecules or motifs recognized by the targeting moiety, further supporting the utility of the scIL-12 in a disease, condition or environment in which the target is or is suspected of being expressed or preferentially expressed. 
     The present invention is not intended to be limited in scope to the particular disclosed embodiments, which are provided, for example, to illustrate various aspects of the invention. Various modifications to the compositions and methods described will become apparent from the description and teachings herein. Such variations may be practiced without departing from the true scope and spirit of the disclosure and are intended to fall within the scope of the present disclosure. 
     
       
         
           
               
            
               
                   
               
               
                 SEQUENCES 
               
            
           
           
               
               
               
            
               
                 SEQ 
                   
                   
               
               
                 ID 
                   
                   
               
               
                 NO. 
                 Sequence 
                 Name 
               
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 G4S(3) 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                   
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSGGGGSGGGGSRNLPVATPDPGMFPCLHHSQNLL 
                   
               
               
                   
                 RAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTKNES 
                   
               
               
                   
                 CLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEFKTMNAKL 
                   
               
               
                   
                 LMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSLEEPDFYKTKIKL 
                   
               
               
                   
                 CILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 2 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 HBP BMP4 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                   
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSRKKNPNCRRHGGGGSRNLPVATPDPGMFPCLHH 
                   
               
               
                   
                 SQNLLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLEL 
                   
               
               
                   
                 TKNESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEFKT 
                   
               
               
                   
                 MNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSLEEPDFY 
                   
               
               
                   
                 KTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 3 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 HBP FBN 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                   
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSKNNQKSEPLIGRKKTGGGGSRNLPVATPDPGMFP 
                   
               
               
                   
                 CLHHSQNLLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACL 
                   
               
               
                   
                 PLELTKNESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVE 
                   
               
               
                   
                 FKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSLEEP 
                   
               
               
                   
                 DFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 4 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 HGFBP 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                   
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSVWNWVCFRDVGCDWVLGGGGSRNLPVATPDPG 
                   
               
               
                   
                 MFPCLHHSQNLLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVE 
                   
               
               
                   
                 ACLPLELTKNESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMY 
                   
               
               
                   
                 QVEFKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSL 
                   
               
               
                   
                 EEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 5 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 EGFRBP 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                   
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSSVDNPHVCGGGGSRNLPVATPDPGMFPCLHHSQ 
                   
               
               
                   
                 NLLRAVSNMLQKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTK 
                   
               
               
                   
                 NESCLNSRETSFITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEFKTMN 
                   
               
               
                   
                 AKLLMDPKRQIFLDQNMLAVIDELMQALNFNSETVPQKSSLEEPDFYKT 
                   
               
               
                   
                 KIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 6 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 Sc IL-12 Anti 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                 EPCAM 
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                   
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCSGGGGSQVQLVQSGAEVKKPGSSVKVSCKASGGTFSSYAI 
                   
               
               
                   
                 SVVVRQAPGQGLEWMGGIIPIFGTANYAQKFQGRVTITADESTSTAYME 
                   
               
               
                   
                 LSSLRSEDTAVYYCARGLLWNYWGQGTLVTVSSKLSGSASAPKLEEGEF 
                   
               
               
                   
                 SEARVETTLTQSPATLSVSPGERATLSCRASQSVSSNLAVVYQQKPGQAP 
                   
               
               
                   
                 RLLIYGASTRATGIPARFSGSGSGTEFTLTISSLQSEDFAVYYCQQYNNWP 
                   
               
               
                   
                 PGFTFGPGTKVDIKGGGGSRNLPVATPDPGMFPCLHHSQNLLRAVSNML 
                   
               
               
                   
                 QKARQTLEFYPCTSEEIDHEDITKDKTSTVEACLPLELTKNESCLNSRETS 
                   
               
               
                   
                 FITNGSCLASRKTSFMMALCLSSIYEDLKMYQVEFKTMNAKLLMDPKRQ 
                   
               
               
                   
                 IFLDQNMLAVIDELMQALNFNSETVPQKSSLEEPDFYKTKIKLCILLHAFR 
                   
               
               
                   
                 IRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 7 
                 GGGGS 
                 G4S linker 
               
               
                   
               
               
                 8 
                 GGGGSGGGGS 
                 G4S(2) linker 
               
               
                   
               
               
                 9 
                 GGGGSGGGGSGGGGS 
                 G4S(3) linker 
               
               
                   
               
               
                 10 
                 RNLPVATPDPGMFPCLHHSQNLLRAVSNMLQKARQTLEFYPCTSEEIDHE 
                 IL-12 p35 
               
               
                   
                 DITKDKTSTVEACLPLELTKNESCLNSRETSFITNGSCLASRKTSFMMALC 
                 UniProt No. P29459 
               
               
                   
                 LSSIYEDLKMYQVEFKTMNAKLLMDPKRQIFLDQNMLAVIDELMQALNF 
                 Residues 23-219 
               
               
                   
                 NSETVPQKSSLEEPDFYKTKIKLCILLHAFRIRAVTIDRVMSYLNAS 
                   
               
               
                   
               
               
                 11 
                 IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLG 
                 IL-12 p40 
               
               
                   
                 SGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKD 
                 UniProt No. P29460 
               
               
                   
                 QKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVT 
                 residues 23-328 
               
               
                   
                 CGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKL 
                   
               
               
                   
                 KYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYF 
                   
               
               
                   
                 SLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSS 
                   
               
               
                   
                 WSEWASVPCS 
                   
               
               
                   
               
               
                 12 
                 MCHQQLVISWFSLVFLASPLVA 
                 IL-12p40 signal 
               
               
                   
                   
                 sequence 
               
               
                   
               
               
                 13 
                 RKKNPNCRRH 
                 Heparin binding 
               
               
                   
                   
                 peptide, BMP4 
               
               
                   
               
               
                 14 
                 KNNQKSEPLIGRKKT 
                 Heparin binding 
               
               
                   
                   
                 peptide, fibronectin 
               
               
                   
               
               
                 15 
                 VWNWVCFRDVGCDWVL 
                 HGF binding peptide 
               
               
                   
               
               
                 16 
                 SVDNPHVC 
                 EGFRBP 
               
               
                   
               
               
                 17 
                 QVQLVQSGAEVKKPGSSVKVSCKASGGTFSSYAISVVVRQAPGQGLEW 
                 Anti-EPCAM scFv 
               
               
                   
                 MGGIIPIFGTANYAQKFQGRVTITADESTSTAYMELSSLRSEDTAVYYCA 
                   
               
               
                   
                 RGLLWNYWGQGTLVTVSSKLSGSASAPKLEEGEFSEARVETTLTQSPAT 
                   
               
               
                   
                 LSVSPGERATLSCRASQSVSSNLAVVYQQKPGQAPRLLIYGASTRATGIP 
                   
               
               
                   
                 ARFSGSGSGTEFTLTISSLQSEDFAVYYCQQYNNWPPGFTFGPGTKVDIK 
                   
               
               
                   
               
               
                 18 
                 MPLLLLLPLLWAGALAM 
                 CD33 signal 
               
               
                   
                   
                 sequence 
               
               
                   
               
               
                 19 
                 MCPARSLLLVATLVLLDHLSLA 
                 IL-12 p35 signal 
               
               
                   
                   
                 sequence 
               
               
                   
               
               
                 20 
                 HHHHHH 
                 6x His-tag 
               
               
                   
               
               
                 21 
                 WSHPQFEK 
                 Strep-tag® II 
               
               
                   
               
               
                 22 
                 KLSGSASAPKLEEGEFSEARV 
                 linker 
               
               
                   
               
               
                 23 
                 GSTSGSGKPGSGEGSTKG 
                 linker 
               
               
                   
               
               
                 24 
                 QVQLVQSGAEVKKPGSSVKVSCKASGGTFSSYAISVVVRQAPGQGLEW 
                 Anti-EPCAM 
               
               
                   
                 MGGIIPIFGTANYAQKFQGRVTITADESTSTAYMELSSLRSEDTAVYYCA 
                 variable light (VL) 
               
               
                   
                 RGLLWNYWGQGTLVTVSS 
                   
               
               
                   
               
               
                 25 
                 ETTLTQSPATLSVSPGERATLSCRASQSVSSNLAVVYQQKPGQAPRLLIY 
                 Anti-EPCAM 
               
               
                   
                 GASTRATGIPARFSGSGSGTEFTLTISSLQSEDFAVYYCQQYNNWPPGFTF 
                 variable heavy (VH) 
               
               
                   
                 GPGTKVDIK 
                   
               
               
                   
               
               
                 26 
                 ATWLPPR 
                 VEGF binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 27 
                 ITMQCGIHQGQHPKIRMICEMSF 
                 VEGFR binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 28 
                 WQPPRARI 
                 bovine origin heparin 
               
               
                   
                   
                 binding peptide 
               
               
                   
               
               
                 29 
                 GGGGS(n) 
                 Linker 
               
               
                   
                   
                 n is 1 to 5 
               
               
                   
               
               
                 30 
                 GIHVFILGCFSAGLPKTEANWVNVISDLKKIEDLIQSMHIDATLYTESDVH 
                 IL-15 
               
               
                   
                 PSCKVTAMKCFLLELQVISLESGDASIHDTVENLIILANNSLSSNGNVTES 
                 Propeptide = amino 
               
               
                   
                 GCKECEELEEKNIKEFLQSFVHIVQMFINTS 
                 acids 1-19 
               
               
                   
               
               
                 31 
                 APTSSSTKKTQLQLEHLLLDLQMILNGINNYKNPKLTRMLTFKFYMPKK 
                 IL-2 
               
               
                   
                 ATELKHLQCLEEELKPLEEVLNLAQSKNFHLRPRDLISNINVIVLELKGSE 
                   
               
               
                   
                 TTFMCEYADETATIVEFLNRWITFCQSIISTLT 
                   
               
               
                   
               
               
                 32 
                 MAAEPVEDNCINFVAMKFIDNTLYFIAEDDENLESDYFGKLESKLSVIRN 
                 IL-19 
               
               
                   
                 LNDQVLFIDQGNRPLFEDMTDSDCRDNAPRTIFIISMYKDSQPRGMAVTI 
                 Propeptide = amino 
               
               
                   
                 SVKCEKISTLSCENKIISFKEMNPPDNIKDTKSDIIFFQRSVPGHDNKMQFE 
                 acids 1-36 
               
               
                   
                 SSSYEGYFLACEKERDLFKLILKKEDELGDRSIMFTVQNED 
                   
               
               
                   
               
               
                 33 
                 APARSPSPSTQPWEHVNAIQEARRLLNLSRDTAAEMNETVEVISEMFDLQ 
                 GM-CSF 
               
               
                   
                 EPTCLQTRLELYKQGLRGSLTKLKGPLTMMASHYKQHCPPTPETSCATQI 
                   
               
               
                   
                 ITFESFKENLKDFLLVIPFDCWEPVQE 
                   
               
               
                   
               
               
                 34 
                 DCDIEGKDGKQYESVLMVSIDQLLDSMKEIGSNCLNNEFNFFKRHICDAN 
                 IL-7 
               
               
                   
                 KEGMFLFRAARKLRQFLKMNSTGDFDLHLLKVSEGTTILLNCTGQVKGR 
                   
               
               
                   
                 KPAALGEAQPTKSLEENKSLKEQKKLNDLCFLKRLLQEIKTCWNKILMG 
                   
               
               
                   
                 TKEH 
                   
               
               
                   
               
               
                 35 
                 QGQDRHMIRMRQLIDIVDQLKNYVNDLVPEFLPAPEDVETNCEWSAFSC 
                 IL-21 
               
               
                   
                 FQKAQLKSANTGNNERIINVSIKKLKRKPPSTNAGRRQKHRLTCPSCDSY 
                   
               
               
                   
                 EKKPPKEFLERFKSLLQKMIHQHLSSRTHGSEDS 
                   
               
               
                   
               
               
                 36 
                 CDLPETHSLDNRRTLMLLAQMSRISPSSCLMDRHDFGFPQEEFDGNQFQ 
                 IFN alpha-1/13 
               
               
                   
                 KAPAISVLHELIQQIFNLFTTKDSSAAWDEDLLDKFCTELYQQLNDLEAC 
                   
               
               
                   
                 VMQEERVGETPLMNADSILAVKKYFRRITLYLTEKKYSPCAWEVVRAEI 
                   
               
               
                   
                 MRSLSLSTNLQERLRRKE 
                   
               
               
                   
               
               
                 37 
                 CDLPQTHSLGSRRTLMLLAQMRKISLFSCLKDRHDFGFPQEEFGNQFQK 
                 IFN alpha-2 
               
               
                   
                 AETIPVLHEMIQQIFNLFSTKDSSAAWDETLLDKFYTELYQQLNDLEACVI 
                   
               
               
                   
                 QGVGVTETPLMKEDSILAVRKYFQRITLYLKEKKYSPCAWEVVRAEIMR 
                   
               
               
                   
                 SFSLSTNLQESLRSKE 
                   
               
               
                   
               
               
                 38 
                 CDLPQTHSLGNRRALILLAQMGRISHFSCLKDRHDFGFPEEEFDGHQFQK 
                 IFN alpha-4 
               
               
                   
                 AQAISVLHEMIQQTFNLFSTEDSSAAWEQSLLEKFSTELYQQLNDLEACV 
                   
               
               
                   
                 IQEVGVEETPLMNEDSILAVRKYFQRITLYLTEKKYSPCAWEVVRAEIMR 
                   
               
               
                   
                 SLSFSTNLQKRLRRKD 
                   
               
               
                   
               
               
                 39 
                 LGCDLPQTHSLSNRRTLMIMAQMGRISPFSCLKDRHDFGFPQEEFDGNQF 
                 IFN alpha-5 
               
               
                   
                 QKAQAISVLHEMIQQTFNLFSTKDSSATWDETLLDKFYTELYQQLNDLE 
                   
               
               
                   
                 ACMMQEVGVEDTPLMNVDSILTVRKYFQRITLYLTEKKYSPCAWEVVR 
                   
               
               
                   
                 AEIMRSFSLSANLQERLRRKE 
                   
               
               
                   
               
               
                 40 
                 SLDCDLPQTHSLGHRRTMMLLAQMRRISLFSCLKDRHDFRFPQEEFDGN 
                 IFN alpha-6 
               
               
                   
                 QFQKAEAISVLHEVIQQTFNLFSTKDSSVAWDERLLDKLYTELYQQLNDL 
                   
               
               
                   
                 EACVMQEVWVGGTPLMNEDSILAVRKYFQRITLYLTEKKYSPCAWEVV 
                   
               
               
                   
                 RAEIMRSFSSSRNLQERLRRKE 
                   
               
               
                   
               
               
                 41 
                 CDLPQTHSLRNRRALILLAQMGRISPFSCLKDRHEFRFPEEEFDGHQFQKT 
                 IFN alpha-7 
               
               
                   
                 QAISVLHEMIQQTFNLFSTEDSSAAWEQSLLEKFSTELYQQLNDLEACVI 
                   
               
               
                   
                 QEVGVEETPLMNEDFILAVRKYFQRITLYLMEKKYSPCAWEVVRAEIMR 
                   
               
               
                   
                 SFSFSTNLKKGLRRKD 
                   
               
               
                   
               
               
                 42 
                 CDLPQTHSLGNRRALILLAQMRRISPFSCLKDRHDFEFPQEEFDDKQFQK 
                 IFN alpha-8 
               
               
                   
                 AQAISVLHEMIQQTFNLFSTKDSSAALDETLLDEFYIELDQQLNDLESCV 
                   
               
               
                   
                 MQEVGVIESPLMYEDSILAVRKYFQRITLYLTEKKYSSCAWEVVRAEIMR 
                   
               
               
                   
                 SFSLSINLQKRLKSKE 
                   
               
               
                   
               
               
                 43 
                 CDLPQTHSLGNRRALILLGQMGRISPFSCLKDRHDFRIPQEEFDGNQFQK 
                 IFN alpha-10 
               
               
                   
                 AQAISVLHEMIQQTFNLFSTEDSSAAWEQSLLEKFSTELYQQLNDLEACV 
                   
               
               
                   
                 IQEVGVEETPLMNEDSILAVRKYFQRITLYLIERKYSPCAWEVVRAEIMRS 
                   
               
               
                   
                 LSFSTNLQKRLRRKD 
                   
               
               
                   
               
               
                 44 
                 CNLSQTHSLNNRRTLMLMAQMRRISPFSCLKDRHDFEFPQEEFDGNQFQ 
                 IFN alpha-14 
               
               
                   
                 KAQAISVLHEMMQQTFNLFSTKNSSAAWDETLLEKFYIELFQQMNDLEA 
                   
               
               
                   
                 CVIQEVGVEETPLMNEDSILAVKKYFQRITLYLMEKKYSPCAWEVVRAEI 
                   
               
               
                   
                 MRSLSFSTNLQKRLRRKD 
                   
               
               
                   
               
               
                 45 
                 CDLPQTHSLGNRRALILLAQMGRISHFSCLKDRYDFGFPQEVFDGNQFQK 
                 IFN alpha-16 
               
               
                   
                 AQAISAFHEMIQQTFNLFSTKDSSAAWDETLLDKFYIELFQQLNDLEACV 
                   
               
               
                   
                 TQEVGVEEIALMNEDSILAVRKYFQRITLYLMGKKYSPCAWEVVRAEIM 
                   
               
               
                   
                 RSFSFSTNLQKGLRRKD 
                   
               
               
                   
               
               
                 46 
                 CDLPQTHSLGNRRALILLAQMGRISPFSCLKDRHDFGLPQEEFDGNQFQK 
                 IFN alpha-17 
               
               
                   
                 TQAISVLHEMIQQTFNLFSTEDSSAAWEQSLLEKFSTELYQQLNNLEACVI 
                   
               
               
                   
                 QEVGMEETPLMNEDSILAVRKYFQRITLYLTEKKYSPCAWEVVRAEIMR 
                   
               
               
                   
                 SLSFSTNLQKILRRKD 
                   
               
               
                   
               
               
                 47 
                 CDLPQTHSLGNRRALILLAQMGRISPFSCLKDRHDFGFPQEEFDGNQFQK 
                 IFN alpha-21 
               
               
                   
                 AQAISVLHEMIQQTFNLFSTKDSSATWEQSLLEKFSTELNQQLNDLEACV 
                   
               
               
                   
                 IQEVGVEETPLMNVDSILAVKKYFQRITLYLTEKKYSPCAWEVVRAEIMR 
                   
               
               
                   
                 SFSLSKIFQERLRRKE 
                   
               
               
                   
               
               
                 48 
                 MSYNLLGFLQRSSNFQCQKLLWQLNGRLEYCLKDRMNFDIPEEIKQLQQ 
                 IFN beta-1 
               
               
                   
                 FQKEDAALTIYEMLQNIFAIFRQDSSSTGWNETIVENLLANVYHQINHLK 
                   
               
               
                   
                 TVLEEKLEKEDFTRGKLMSSLHLKRYYGRILHYLKAKEYSHCAWTIVRV 
                   
               
               
                   
                 EILRNFYFINRLTGYLRN 
                   
               
               
                   
               
               
                 49 
                 QDPYVKEAENLKKYFNAGHSDVADNGTLFLGILKNWKEESDRKIMQSQI 
                 IFN gamma 
               
               
                   
                 VSFYFKLFKNFKDDQSIQKSVETIKEDMNVKFFNSNKKKRDDFEKLTNY 
                   
               
               
                   
                 SVTDLNVQRKAIHELIQVMAELSPAAKTGKRKRSQMLFRGRRASQ 
                   
               
               
                   
               
               
                 50 
                 GITIPRNPGCPNSEDKNFPRTVMVNLNIHNRNTNTNPKRSSDYYNRSTSP 
                 IL-17A 
               
               
                   
                 WNLHRNEDPERYPSVIWEAKCRHLGCINADGNVDYHMNSVPIQQEILVL 
                   
               
               
                   
                 RREPPHCPNSFRLEKILVSVGCTCVTPIVHHVA 
                   
               
               
                   
               
               
                 51 
                 RKIPKVGHTFFQKPESCPPVPGGSMKLDIGIINENQRVSMSRNIESRSTSP 
                 IL-17F 
               
               
                   
                 WNYTVTWDPNRYPSEVVQAQCRNLGCINAQGKEDISMNSVPIQQETLV 
                   
               
               
                   
                 VRRKHQGCSVSFQLEKVLVTVGCTCVTPVIHHVQ 
                   
               
               
                   
               
               
                 52 
                 RAVPGGSSPAWTQCQQLSQKLCTLAWSAHPLVGHMDLREEGDEETTND 
                 IL-23 alpha (p19) 
               
               
                   
                 VPHIQCGDGCDPQGLRDNSQFCLQRIHQGLIFYEKLLGSDIFTGEPSLLPD 
                   
               
               
                   
                 SPVGQLHASLLGLSQLLQPEGHHWETQQIPSLSPSQPWQRLLLRFKILRSL 
                   
               
               
                   
                 QAFVAVAARVFAHGAATLSP 
                   
               
               
                   
               
               
                 53 
                 APMTQTTPLKTSWVNCSNMIDEIITHLKQPPLPLLDFNNLNGEDQDILME 
                 IL-3 
               
               
                   
                 NNLRRPNLEAFNRAVKSLQNASAIESILKNLLPCLPLATAAPTRHPIHIKD 
                   
               
               
                   
                 GDWNEFRRKLTFYLKTLENAQAQQTTLSLAIF 
                   
               
               
                   
               
               
                 54 
                 HKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAASKNTTEKETFCRAATVL 
                 IL-4 
               
               
                   
                 RQFYSHHEKDTRCLGATAQQFHRHKQLIRFLKRLDRNLWGLAGLNSCPV 
                   
               
               
                   
                 KEANQSTLENFLERLKTIMREKYSKCSS 
                   
               
               
                   
               
               
                 55 
                 IPTEIPTSALVKETLALLSTHRTLLIANETLRIPVPVHKNHQLCTEEIFQGIG 
                 IL-5 
               
               
                   
                 TLESQTVQGGTVERLFKNLSLIKKYIDGQKKKCGEERRRVNQFLDYLQEF 
                   
               
               
                   
                 LGVMNTEWIIES 
                   
               
               
                   
               
               
                 56 
                 VPPGEDSKDVAAPHRQPLTSSERIDKQIRYILDGISALRKETCNKSNMCES 
                 IL-6 
               
               
                   
                 SKEALAENNLNLPKMAEKDGCFQSGFNEETCLVKIITGLLEFEVYLEYLQ 
                   
               
               
                   
                 NRFESSEEQARAVQMSTKVLIQFLQKKAKNLDAITTPDPTTNASLLTKLQ 
                   
               
               
                   
                 AQNQWLQDMTTHLILRSFKEFLQSSLRALRQM 
                   
               
               
                   
               
               
                 57 
                 QGCPTLAGILDINFLINKMQEDPASKCHCSANVTSCLCLGIPSDNCTRPCF 
                 IL-9 
               
               
                   
                 SERLSQMTNTTMQTRYPLIFSRVKKSVEVLKNNKCPYFSCEQPCNQTTA 
                   
               
               
                   
                 GNALTFLKSLLEIFQKEKMRGMRGKI 
                   
               
               
                   
               
               
                 58 
                 PGPPPGPPRVSPDPRAELDSTVLLTRSLLADTRQLAAQLRDKFPADGDHN 
                 IL-11 
               
               
                   
                 LDSLPTLAMSAGALGALQLPGVLTRLRADLLSYLRHVQWLRRAGGSSLK 
                   
               
               
                   
                 TLEPELGTLQARLDRLLRRLQ 
                   
               
               
                   
                 LLMSRLALPQPPPDPPAPPLAPPSSAWGGIRAAHAILGGLHLTLDWAVRG 
                   
               
               
                   
                 LLLLKTRL 
                   
               
               
                   
               
               
                 59 
                 LTCLGGFASPGPVPPSTALRELIEELVNITQNQKAPLCNGSMVWSINLTAG 
                 IL-13 
               
               
                   
                 MYCAALESLINVSGCSAIEKTQRMLSGFCPHKVSAGQFSSLHVRDTKIEV 
                   
               
               
                   
                 AQFVKDLLLHLKKLFREGRFN 
                   
               
               
                   
               
               
                 60 
                 FPRPPGRPQLSLQELRREFTVSLHLARKLLSEVRGQAHRFAESHLPGVNL 
                 IL-27 alpha (p28) 
               
               
                   
                 YLLPLGEQLPDVSLTFQAWRRLSDPERLCFISTTLQPFHALLGGLGTQGR 
                   
               
               
                   
                 WTNMERMQLWAMRLDLRDLQRHLRFQVLAAGFNLPEEEEEEEEEEEEE 
                   
               
               
                   
                 RKGLLPGALGSALQGPAQVSWPQLLSTYRLLHSLELVLSRAVRELLLLSK 
                   
               
               
                   
                 AGHSVWPLGFPTLSPQP 
                   
               
               
                   
               
               
                 61 
                 RKGPPAALTLPRVQCRASRYPIAVDCSWTLPPAPNSTSPVSFIATYRLGM 
                 IL-27 beta (EBI3), 
               
               
                   
                 AARGHSWPCLQQTPTSTSCTITDVQLFSMAPYVLNVTAVHPWGSSSSFV 
                 IL-35 beta 
               
               
                   
                 PFITEHIIKPDPPEGVRLSPLAERQLQVQWEPPGSWPFPEIFSLKYWIRYKR 
                   
               
               
                   
                 QGAARFHRVGPIEATSFILRAVRPRARYYVQVAAQDLTDYGELSDWSLP 
                   
               
               
                   
                 ATATMSLGK 
                   
               
               
                   
               
               
                 62 
                 APPRLICDSRVLERYLLEAKEAENITTGCAEHCSLNENITVPDTKVNFYA 
                 Erythropoietin 
               
               
                   
                 WKRMEVGQQAVEVWQGLALLSEAVLRGQALLVNSSQPWEPLQLHVDK 
                   
               
               
                   
                 AVSGLRSLTTLLRALGAQKEAISPPDAASAAPLRTITADTFRKLFRVYSNF 
                   
               
               
                   
                 LRGKLKLYTGEACRTGDR 
                   
               
               
                   
               
               
                 63 
                 ATPLGPASSLPQSFLLKCLEQVRKIQGDGAALQEKLVSECATYKLCHPEE 
                 G-CSF 
               
               
                   
                 LVLLGHSLGIPWAPLSSCPSQALQLAGCLSQLHSGLFLYQGLLQALEGISP 
                   
               
               
                   
                 ELGPTLDTLQLDVADFATTIWQQMEELGMAPALQPTQGAMPAFASAFQ 
                   
               
               
                   
                 RRAGGVLVASHLQSFLEVSYRVLRHLAQP 
                   
               
               
                   
               
               
                 64 
                 FPTIPLSRLFDNAMLRAHRLHQLAFDTYQEFEEAYIPKEQKYSFLQNPQTS 
                 Growth hormone 
               
               
                   
                 LCFSESIPTPSNREETQQKSNLELLRISLLLIQSWLEPVQFLRSVFANSLVY 
                   
               
               
                   
                 GASDSNVYDLLKDLEEG 
                   
               
               
                   
                 IQTLMGRLEDGSPRTGQIFKQTYSKFDTNSHNDDALLKNYGLLYCFRKD 
                   
               
               
                   
                 MDKVETFLRIVQCRSVEGSCGF 
                   
               
               
                   
               
               
                 65 
                 LPICPGGAARCQVTLRDLFDRAVVLSHYIHNLSSEMFSEFDKRYTHGRGF 
                 Prolactin 
               
               
                   
                 ITKAINSCHTSSLATPEDKEQAQQMNQKDFLSLIVSILRSWNEPLYHLVTE 
                   
               
               
                   
                 VRGMQEAPEAILSKAVEIEEQTKRLLEGMELIVSQVHPETKENEIYPVWS 
                   
               
               
                   
                 GLPSLQMADEESRLSAYYNLLHCLRRDSHKIDNYLKLLKCRIIHNNNC 
                   
               
               
                   
               
               
                 66 
                 AAIGSCSKEYRVLLGQLQKQTDLMQDTSRLLDPYIRIQGLDVPKLREHCR 
                 Oncostatin M 
               
               
                   
                 ERPGAFPSEETLRGLGRRGFLQTLNATLGCVLHRLADLEQRLPKAQDLER 
                   
               
               
                   
                 SGLNIEDLEKLQMARPNILGLRNNIYCMAQLLDNSDTAEPTKAGRGASQ 
                   
               
               
                   
                 PPTPTPASDAFQRKLEGCRFLHGYHRFMHSVGRVFSKWGESPNRSRR HS   
                   
               
               
                   
                 
                   PHQALRKGVRRTRPSRKGKRLMTRGQLPR 
                 
                   
               
               
                   
               
               
                 67 
                 SPLPITPVNATCAIRHPCHNNLMNQIRSQLAQLNGSANALFILYYTAQGEP 
                 Leukemia inhibitory 
               
               
                   
                 FPNNLDKLCGPNVTDFPPFHANGTEKAKLVELYRIVVYLGTSLGNITRDQ 
                 factor 
               
               
                   
                 KILNPSALSLHSKLNATADILRGLLSNVLCRLCSKYHVGHVDVTYGPDTS 
                   
               
               
                   
                 GKDVFQKKKLGCQLLGKYKQIIAVLAQAF 
                   
               
               
                   
               
               
                 68 
                 APISSHCRLDKSNFQQPYITNRTFMLAKEASLADNNTDVRLIGEKLFHGV 
                 IL-22 
               
               
                   
                 SMSERCYLMKQVLNFTLEEVLFPQSDRFQPYMQEVVPFLARLSNRLSTC 
                   
               
               
                   
                 HIEGDDLHIQRNVQKLKDTVKKLGESGEIKAIGELDLLFMSLRNACI 
                   
               
               
                   
               
               
                 69 
                 SPGQGTQSENSCTHFPGNLPNMLRDLRDAFSRVKTFFQMKDQLDNLLLK 
                 IL-10 
               
               
                   
                 ESLLEDFKGYLGCQALSEMIQFYLEEVMPQAENQDPDIKAHVNSLGENL 
                   
               
               
                   
                 KTLRLRLRRCHRFLPCENKSKAVEQVKNAFNKLQEKGIYKAMSEFDIFIN 
                   
               
               
                   
                 YIEAYMTMKIRN 
                   
               
               
                   
               
               
                 70 
                 ESKYGPPCPPCP 
                 spacer (IgG4hinge) 
               
               
                   
               
               
                 71 
                 GAATCTAAGTACGGACCGCCCTGCCCCCCTTGCCCT 
                 spacer (IgG4hinge) 
               
               
                   
               
               
                 72 
                 ESKYGPPCPPCPGQPREPQVYTLPPSQEEMTKNQVSLTCLVKGFYPSDIA 
                 Hinge-CH3 spacer 
               
               
                   
                 VEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQEGNVFSCSV 
                   
               
               
                   
                 MHEALHNHYTQKSLSLSLGK 
                   
               
               
                   
               
               
                 73 
                 ESKYGPPCPPCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQE 
                 Hinge-CH2-CH3 
               
               
                   
                 DPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNG 
                 spacer 
               
               
                   
                 KEYKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLT 
                   
               
               
                   
                 CLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSR 
                   
               
               
                   
                 WQEGNVFSCSVMHEALHNHYTQKSLSLSLGK 
                   
               
               
                   
               
               
                 74 
                 RWPESPKAQASSVPTAQPQAEGSLAKATTAPATTRNTGRGGEEKKKEKE 
                 IgD-hinge-Fc 
               
               
                   
                 KEEQEERETKTPECPSHTQPLGVYLLTPAVQDLWLRDKATFTCFVVGSD 
                   
               
               
                   
                 LKDAHLTWEVAGKVPTGGVEEGLLERHSNGSQSQHSRLTLPRSLWNAG 
                   
               
               
                   
                 TSVTCTLNHPSLPPQRLMALREPAAQAPVKLSLNLLASSDPPEAASWLLC 
                   
               
               
                   
                 EVSGFSPPNILLMWLEDQREVNTSGFAPARPPPQPGSTTFWAWSVLRVPA 
                   
               
               
                   
                 PPSPQPATYTCVVSHEDSRTLLNASRSLEVSYVTDH 
                   
               
               
                   
               
               
                 75 
                 MLLLVTSLLLCELPHPAFLLIPRKVCNGIGIGEFKDSLSINATNIKHFKNCT 
                 tEGFR 
               
               
                   
                 SISGDLHILPVAFRGDSFTHTPPLDPQELDILKTVKEITGFLLIQAWPENRT 
                   
               
               
                   
                 DLHAFENLEIIRGRTKQHGQFSLAVVSLNITSLGLRSLKEISDGDVIISGNK 
                   
               
               
                   
                 NLCYANTINWKKLFGTSGQKTKIISNRGENSCKATGQVCHALCSPEGCW 
                   
               
               
                   
                 GPEPRDCVSCRNVSRGRECVDKCNLLEGEPREFVENSECIQCHPECLPQA 
                   
               
               
                   
                 MNITCTGRGPDNCIQCAHYIDGPHCVKTCPAGVMGENNTLVWKYADAG 
                   
               
               
                   
                 HVCHLCHPNCTYGCTGPGLEGCPTNGPKIPSIATGMVGALLLLLVVALGI 
                   
               
               
                   
                 GLFM 
                   
               
               
                   
               
               
                 76 
                 LEGGGEGRGSLLTCGDVEENPGPR 
                 T2A 
               
               
                   
               
               
                 77 
                 FWVLVVVGGVLACYSLLVTVAFIIFWV 
                 CD28 (amino acids 
               
               
                   
                   
                 153-179 of Accession 
               
               
                   
                   
                 No. P10747) 
               
               
                   
               
               
                 78 
                 IEVMYPPPYLDNEKSNGTIIHVKGKHLCPSPLFPGPSKP 
                 CD28 (amino acids 
               
               
                   
                 FWVLVVVGGVLACYSLLVTVAFIIFWV 
                 114-179 of Accession 
               
               
                   
                   
                 No. P10747) 
               
               
                   
               
               
                 79 
                 RSKRSRLLHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRS 
                 CD28 (amino acids 
               
               
                   
                   
                 180-220 of P10747) 
               
               
                   
               
               
                 80 
                 RSKRSRGGHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRS 
                 CD28 (LL to GG) 
               
               
                   
               
               
                 81 
                 KRGRKKLLYIFKQPFMRPVQTTQEEDGCSCRFPEEEEGGCEL 
                 4-1BB (amino acids 
               
               
                   
                   
                 214-255 of 
               
               
                   
                   
                 Q07011.1) 
               
               
                   
               
               
                 82 
                 RVKFSRSADAPAYQQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGG 
                 CD3 zeta 
               
               
                   
                 KPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLY 
                   
               
               
                   
                 QGLSTATKDTYDALHMQALPPR 
                   
               
               
                   
               
               
                 83 
                 RVKFSRSAEPPAYQQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGGK 
                 CD3 zeta 
               
               
                   
                 PRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLY 
                   
               
               
                   
                 QGLSTATKDTYDALHMQALPPR 
                   
               
               
                   
               
               
                 84 
                 RVKFSRSADAPAYKQGQNQLYNELNLGRREEYDVLDKRRGRDPEMGG 
                 CD3 zeta 
               
               
                   
                 KPRRKNPQEGLYNELQKDKMAEAYSEIGMKGERRRGKGHDGLY 
                   
               
               
                   
                 QGLSTATKDTYDALHMQALPPR 
                   
               
               
                   
               
               
                 85 
                 gccctacgtgctgtctcacacagcctgtctgac 
                 Epo HRE 
               
               
                   
               
               
                 86 
                 ccacagtgcatacgtgggctccaacaggtcctctt 
                 VEGF-A HRE 
               
               
                   
               
               
                 87 
                 gacgtgacaaacgaagccgacgtc 
                 PGK1 HRE 
               
               
                   
               
               
                 88 
                 acacgtgggttcccgcacgtccgc 
                 LdhA HRE 
               
               
                   
               
               
                 89 
                 gacgtgactcggaccacat 
                 ALDA HRE 
               
               
                   
               
               
                 90 
                 gcccacacgctcggtgcgtgcccagttgaac 
                 GAPDH HRE 
               
               
                   
               
               
                 91 
                 ccttatttgg 
                 Exemplary CArG 
               
               
                   
                   
                 motif 
               
               
                   
               
               
                 92 
                 cgcgtgatatccttatttggccttatttggccttatttggccttatttgg 
                 Synthetic CArG 
               
               
                   
                   
                 sequence-containing 
               
               
                   
                   
                 promoter 
               
               
                   
               
               
                 93 
                 cgcgtgatatccttatttggccttatttggccttatttggccttatttgg 
                 Synthetic CArG 
               
               
                   
                 ccttatttggccttatttgg 
                 sequence-containing 
               
               
                   
                   
                 promoter 
               
               
                   
               
               
                 94 
                 cgcgtgatatccttatttggccttatttggccttatttggccttatttgg 
                 Synthetic CArG 
               
               
                   
                 ccttatttggccttatttggccttatttggccttatttgg 
                 sequence-containing 
               
               
                   
                   
                 promoter 
               
               
                   
               
               
                 95 
                 cgcgtgatatccttatttggccttatttggccttatttggccttatttgg 
                 Synthetic CArG 
               
               
                   
                 ccttatttggccttatttggccttatttggccttatttggccttatttgg 
                 sequence-containing 
               
               
                   
                 ccttatttgg 
                 promoter 
               
               
                   
               
               
                 96 
                 EGRGSLLTCGDVEENPGP 
                 T2A 
               
               
                   
               
               
                 97 
                 GSGATNFSLLKQAGDVEENPGP 
                 P2A 
               
               
                   
               
               
                 98 
                 ATNFSLLKQAGDVEENPGP 
                 P2A 
               
               
                   
               
               
                 99 
                 QCTNYALLKLAGDVESNPGP 
                 E2A 
               
               
                   
               
               
                 100 
                 VKQTLNFDLLKLAGDVESNPGP 
                 F2A 
               
               
                   
               
               
                 101 
                 RKVCNGIGIGEFKDSLSINATNIKHFKNCTSISGDLHILPVAFRGDSFTHTP 
                 tEGFR 
               
               
                   
                 PLDPQELDILKTVKEITGFLLIQAWPENRTDLHAFENLEIIRGRTKQHGQF 
                   
               
               
                   
                 SLAVVSLNITSLGLRSLKEISDGDVIISGNKNLCYANTINWKKLFGTSGQK 
                   
               
               
                   
                 TKIISNRGENSCKATGQVCHALCSPEGCWGPEPRDCVSCRNVSRGRECV 
                   
               
               
                   
                 DKCNLLEGEPREFVENSECIQCHPECLPQAMNITCTGRGPDNCIQCAHYI 
                   
               
               
                   
                 DGPHCVKTCPAGVMGENNTLVWKYADAGHVCHLCHPNCTYGCTGPGL 
                   
               
               
                   
                 EGCPTNGPKIPSIATGMVGALLLLLVVALGIGLFM 
                   
               
               
                   
               
               
                 102 
                 gctagcgccaccatgcccctgctgctgctgctgcctctgctgtgggctgg 
                 Sc IL-12 G4S(3) 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcctgatgccccaggagagatggtggtcctgacttgcgacacc 
                   
               
               
                   
                 cccgaggaagatggcatcacttggaccctggatcagagctccgaggtgct 
                   
               
               
                   
                 gggaagcggcaaaacactgactattcaggtcaaggaattcggggacgctg 
                   
               
               
                   
                 gacagtacacatgtcacaagggaggagaggtgctgagccactccctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacggcatctggagcactgacattctgaaaga 
                   
               
               
                   
                 tcagaaggagccaaagaacaaaaccttcctgcgctgcgaagcaaaaaatt 
                   
               
               
                   
                 atagcggccggttcacctgttggtggctgaccacaatcagcacagatctg 
                   
               
               
                   
                 actttttccgtgaagtctagtagggggtcaagcgacccacagggagtcac 
                   
               
               
                   
                 atgcggagcagctactctgtccgccgagcgggtgagaggagataacaagg 
                   
               
               
                   
                 agtacgaatattcagtcgagtgccaggaagacagcgcatgtcctgcagcc 
                   
               
               
                   
                 gaggaatctctgccaatcgaagtgatggtcgatgccgtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttatccgagacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaattctcgccaggtg 
                   
               
               
                   
                 gaggtcagttgggaatacccagacacctggagcacaccccattcatattt 
                   
               
               
                   
                 cagcctgactttttgcgtgcaggtccagggcaagagtaaaagagagaaga 
                   
               
               
                   
                 aagacagggtgttcactgataaaaccagcgccacagtcatctgtcggaag 
                   
               
               
                   
                 aacgcctctattagtgtgcgagctcaggatcggtactatagttcaagctg 
                   
               
               
                   
                 gtccgaatgggcttctgtgccttgtagtggaggaggaggaagcggaggag 
                   
               
               
                   
                 gaggatccggaggaggcgggtctagaaatctgcctgtggcaaccccagac 
                   
               
               
                   
                 cccggcatgttcccatgcctgcaccattcccagaacctgctgcgggcagt 
                   
               
               
                   
                 gtctaatatgctgcagaaggccagacagaccctggagttttacccctgta 
                   
               
               
                   
                 catccgaggaaatcgaccacgaggatattaccaaggataaaacctctaca 
                   
               
               
                   
                 gtggaagcttgcctgcctctggagctgacaaagaacgaatcatgtctgaa 
                   
               
               
                   
                 tagcagggagacttccttcatcaccaacggctcttgcctggccagtcgca 
                   
               
               
                   
                 agaccagcttcatgatggctctgtgcctgtcctctatctacgaggacctg 
                   
               
               
                   
                 aagatgtatcaggtggaattcaaaaccatgaacgccaagctgctgatgga 
                   
               
               
                   
                 ccctaaaaggcagatctttctggatcagaatatgctggctgtgattgacg 
                   
               
               
                   
                 agctgatgcaggcactgaacttcaatagcgaaacagtcccccagaagagt 
                   
               
               
                   
                 tcactggaggaacctgatttctacaagactaaaatcaagctgtgcattct 
                   
               
               
                   
                 gctgcacgcttttaggatccgcgcagtgaccattgaccgcgtcatgagtt 
                   
               
               
                   
                 atctgaatgcctcacaccatcaccatcaccattggtcccatccacagttt 
                   
               
               
                   
                 gagaagtgataactcgag 
                   
               
               
                   
               
               
                 103 
                 gctagcgccaccatgcccctgctgctgctgctgcctctgctgtgggctgg 
                 Sc IL-12 HBP BMP4 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcctgatgccccaggggagatggtggtcctgacttgcgacacc 
                   
               
               
                   
                 cccgaggaagatggaatcacttggaccctggatcagagctccgaggtgct 
                   
               
               
                   
                 ggggtccggaaaaacactgactattcaggtcaaggaattcggcgacgctg 
                   
               
               
                   
                 ggcagtacacatgtcacaagggaggagaggtgctgagccactccctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacggaatctggtctactgacattctgaaaga 
                   
               
               
                   
                 tcagaaggagcctaagaacaaaaccttcctgcggtgcgaagcaaaaaatt 
                   
               
               
                   
                 atagcggccggttcacctgttggtggctgaccacaatctctacagatctg 
                   
               
               
                   
                 acttttagtgtgaagtctagtaggggctcaagcgacccacagggagtcac 
                   
               
               
                   
                 atgcggagcagctactctgagcgccgagagggtgcgcggggataacaagg 
                   
               
               
                   
                 agtacgaatattccgtcgagtgccaggaagactctgcatgtcctgcagcc 
                   
               
               
                   
                 gaggaatccctgccaatcgaagtgatggtcgatgccgtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttattagggacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaattcacgccaggtg 
                   
               
               
                   
                 gaggtcagctgggaatacccagacacctggagcacaccccattcatattt 
                   
               
               
                   
                 cagcctgactttttgcgtgcaggtccagggcaagagcaaacgcgagaaga 
                   
               
               
                   
                 aagaccgagtgttcactgataaaacctccgctacagtcatctgccgcaag 
                   
               
               
                   
                 aacgcctctattagtgtgagagctcaggataggtactatagttcaagctg 
                   
               
               
                   
                 gtccgaatgggcatctgtgccatgcagtggaggaggaggaagccggaaga 
                   
               
               
                   
                 aaaaccctaattgtcggagacacggcgggggaggctccagaaatctgcct 
                   
               
               
                   
                 gtggctaccccagaccccgggatgttcccatgcctgcaccatagtcagaa 
                   
               
               
                   
                 cctgctgagggcagtgtcaaatatgctgcagaaggcccgccagaccctgg 
                   
               
               
                   
                 agttttacccatgtacatctgaggaaatcgaccacgaggatattaccaag 
                   
               
               
                   
                 gataaaaccagtacagtggaagcctgcctgcccctggagctgacaaagaa 
                   
               
               
                   
                 cgaatcatgtctgaatagccgagagacttccttcatcaccaacggctctt 
                   
               
               
                   
                 gcctggccagtcgcaagaccagcttcatgatggctctgtgcctgtcctct 
                   
               
               
                   
                 atctacgaggacctgaagatgtatcaggtggaattcaaaaccatgaacgc 
                   
               
               
                   
                 caagctgctgatggaccccaaacggcagatctttctggatcagaatatgc 
                   
               
               
                   
                 tggctgtgattgacgagctgatgcaggcactgaacttcaattctgaaaca 
                   
               
               
                   
                 gtcccccagaagagttcactggaggaacctgatttctacaagactaaaat 
                   
               
               
                   
                 caagctgtgcattctgctgcacgcttttcgaatccgggcagtgaccattg 
                   
               
               
                   
                 acagagtcatgagctatctgaatgcctcccaccatcaccatcaccattgg 
                   
               
               
                   
                 agccatcctcagtttgagaagtgataactcgag 
                   
               
               
                   
               
               
                 104 
                 gctagcgccaccatgcccctgctgctgctgctgcctctgctgtgggctgg 
                 Sc IL-12 HBP FBN 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcctgatgccccaggggagatggtggtcctgacttgcgacacc 
                   
               
               
                   
                 cccgaggaagatggaatcacttggaccctggatcagagctccgaggtgct 
                   
               
               
                   
                 ggggagcggaaaaacactgactattcaggtcaaggaattcggcgacgctg 
                   
               
               
                   
                 ggcagtacacatgtcacaagggaggagaggtgctgagccactccctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacgggatctggtctacagacattctgaaaga 
                   
               
               
                   
                 tcagaaggagcctaagaacaaaactttcctgcgctgcgaagcaaaaaatt 
                   
               
               
                   
                 atagcggccggttcacctgttggtggctgaccacaatctctacagatctg 
                   
               
               
                   
                 acttttagtgtgaagtctagtaggggatcaagcgacccacagggagtcac 
                   
               
               
                   
                 atgcggagcagctactctgagcgccgagcgggtgagaggcgataacaagg 
                   
               
               
                   
                 agtacgaatatagtgtcgagtgccaggaagactcagcatgtcctgcagcc 
                   
               
               
                   
                 gaggaatccctgccaatcgaagtgatggtcgatgccgtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttattcgggacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaattcaagacaggtg 
                   
               
               
                   
                 gaggtcagctgggaatacccagacacctggtccacaccccattcatattt 
                   
               
               
                   
                 cagcctgaccttttgcgtgcaggtccagggcaagtctaaaagagagaaga 
                   
               
               
                   
                 aagacagggtgttcactgataaaaccagtgctacagtcatctgtagaaag 
                   
               
               
                   
                 aacgcctctattagtgtgcgagctcaggatcggtactatagttcaagctg 
                   
               
               
                   
                 gtccgagtgggcatctgtgccctgtagtggaggcgggggatccaaaaaca 
                   
               
               
                   
                 atcagaagtctgaacctctgatcggccggaagaaaactggcgggggaggc 
                   
               
               
                   
                 agcagaaatctgcctgtggctaccccagatcccgggatgttcccatgcct 
                   
               
               
                   
                 gcaccatagccagaacctgctgagggcagtgtccaatatgctgcagaagg 
                   
               
               
                   
                 cccgccagaccctggagttttacccatgtacaagcgaggaaatcgaccac 
                   
               
               
                   
                 gaggatattactaaggacaaaacctccacagtggaagcctgcctgcccct 
                   
               
               
                   
                 ggagctgaccaagaacgaatcatgtctgaatagccgagagacttccttca 
                   
               
               
                   
                 tcaccaacggctcttgcctggccagtcgcaagaccagcttcatgatggct 
                   
               
               
                   
                 ctgtgcctgtcctctatctacgaggacctgaagatgtatcaggtggaatt 
                   
               
               
                   
                 caaaactatgaacgccaagctgctgatggaccccaaaaggcagatctttc 
                   
               
               
                   
                 tggatcagaatatgctggctgtgattgacgagctgatgcaggcactgaac 
                   
               
               
                   
                 ttcaattctgaaaccgtcccccagaagagttcactggaggaacctgattt 
                   
               
               
                   
                 ctacaagacaaaaatcaagctgtgcattctgctgcacgcttttaggatcc 
                   
               
               
                   
                 gcgcagtgaccattgaccgcgtcatgagctatctgaatgcctcccaccat 
                   
               
               
                   
                 caccatcaccattggagccatcctcagtttgagaagtgataactcgag 
                   
               
               
                   
               
               
                 105 
                 gctagcgccaccatgcccctgctgctgctgctgcctctgctgtgggctgg 
                 Sc IL-12 HGFBP 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcctgatgccccaggggagatggtggtcctgacttgcgacacc 
                   
               
               
                   
                 cccgaggaagatggaatcacttggaccctggatcagagctccgaggtgct 
                   
               
               
                   
                 ggggtccggaaaaacactgactattcaggtcaaggaattcggcgacgctg 
                   
               
               
                   
                 ggcagtacacatgtcacaagggaggagaggtgctgagccactccctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacgggatctggtctactgacattctgaaaga 
                   
               
               
                   
                 tcagaaggagccaaagaacaaaaccttcctgcgctgcgaagcaaaaaatt 
                   
               
               
                   
                 atagcggccggttcacctgttggtggctgaccacaatctctacagatctg 
                   
               
               
                   
                 acttttagtgtgaagtctagtaggggctcaagcgacccacagggagtcac 
                   
               
               
                   
                 atgcggagcagctactctgagcgccgagcgggtgagaggggataacaagg 
                   
               
               
                   
                 agtacgaatattccgtcgagtgccaggaagactctgcatgtcctgcagcc 
                   
               
               
                   
                 gaggaatccctgccaatcgaagtgatggtcgatgccgtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttattcgggacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaattcaagacaggtg 
                   
               
               
                   
                 gaggtcagctgggaatacccagacacctggagcacaccccattcatattt 
                   
               
               
                   
                 cagcctgactttttgcgtgcaggtccagggcaagagcaaaagagagaaga 
                   
               
               
                   
                 aagacagggtgttcactgataaaacctccgctacagtcatctgcagaaag 
                   
               
               
                   
                 aacgcctctattagtgtgcgagctcaggatcggtactatagttcaagctg 
                   
               
               
                   
                 gtccgaatgggcatctgtgccttgtagtggaggcgggggaagcgtgtgga 
                   
               
               
                   
                 actgggtctgctttagggacgtgggatgtgattgggtcctgggaggagga 
                   
               
               
                   
                 ggctcccgcaatctgcctgtggctaccccagatcccggcatgttcccatg 
                   
               
               
                   
                 cctgcaccatagtcagaacctgctgcgggcagtgtcaaatatgctgcaga 
                   
               
               
                   
                 aggccagacagaccctggagttttacccctgtacatctgaggaaatcgac 
                   
               
               
                   
                 cacgaggatattaccaaggacaaaaccagtacagtggaagcctgcctgcc 
                   
               
               
                   
                 tctggagctgacaaagaacgaatcatgtctgaatagccgagagacttcct 
                   
               
               
                   
                 tcatcaccaacggctcttgcctggccagtcgcaagaccagcttcatgatg 
                   
               
               
                   
                 gctctgtgcctgtcctctatctacgaggacctgaagatgtatcaggtgga 
                   
               
               
                   
                 attcaaaaccatgaacgccaagctgctgatggaccctaaaaggcagatct 
                   
               
               
                   
                 ttctggatcagaatatgctggctgtgattgacgagctgatgcaggcactg 
                   
               
               
                   
                 aacttcaattctgaaacagtgccccagaagagttcactggaggaacctga 
                   
               
               
                   
                 tttctacaagactaaaatcaagctgtgcattctgctgcacgcttttagga 
                   
               
               
                   
                 tccgcgcagtgaccattgaccgcgtcatgagctatctgaatgcctcccac 
                   
               
               
                   
                 catcaccatcaccattggagccatccacagtttgagaagtgataactcga 
                   
               
               
                   
                 g 
                   
               
               
                   
               
               
                 106 
                 gctagcgccaccatgcccctgctgctgctgctgcctctgctgtgggctgg 
                 Sc IL-12 EGFRBP 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcctgatgccccaggggagatggtggtcctgacttgcgacacc 
                   
               
               
                   
                 cccgaggaagatggaatcacttggaccctggatcagagctccgaggtgct 
                   
               
               
                   
                 ggggagcggaaaaacactgactattcaggtcaaggaattcggcgacgctg 
                   
               
               
                   
                 ggcagtacacatgtcacaagggcggggaggtgctgtctcacagtctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacggaatctggtctactgacattctgaaaga 
                   
               
               
                   
                 tcagaaggagcctaagaacaaaaccttcctgcgctgcgaagcaaaaaatt 
                   
               
               
                   
                 atagcggccggttcacctgttggtggctgaccacaatctcaacagatctg 
                   
               
               
                   
                 acttttagcgtgaagtctagtaggggctcaagcgacccacagggagtcac 
                   
               
               
                   
                 atgcggagcagctactctgagcgccgagcgggtgagaggggataacaagg 
                   
               
               
                   
                 agtacgaatatagtgtcgagtgccaggaagactcagcatgtcctgcagcc 
                   
               
               
                   
                 gaggaatccctgccaatcgaagtgatggtcgatgccgtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttatccgagacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaattcccgccaggtg 
                   
               
               
                   
                 gaggtctcttgggaatacccagacacctggtccacaccccattcctattt 
                   
               
               
                   
                 ctctctgactttttgcgtgcaggtccagggcaagtctaaaagagagaaga 
                   
               
               
                   
                 aagacagggtgttcactgataaaaccagtgctacagtcatctgccggaag 
                   
               
               
                   
                 aacgcctcaattagcgtgcgagctcaggaccggtactatagttcaagctg 
                   
               
               
                   
                 gagtgaatgggcatcagtgccatgcagcggaggaggaggatcctctgtgg 
                   
               
               
                   
                 ataaccctcacgtctgtggcggaggaggcagcagaaatctgcctgtggct 
                   
               
               
                   
                 accccagaccccgggatgttcccatgcctgcaccatagccagaacctgct 
                   
               
               
                   
                 gcgggcagtgtccaatatgctgcagaaggccagacagaccctggagtttt 
                   
               
               
                   
                 acccatgtacaagcgaggaaatcgaccacgaggatattaccaaggataaa 
                   
               
               
                   
                 acctccacagtggaagcctgcctgcccctggagctgacaaagaacgaatc 
                   
               
               
                   
                 ctgtctgaattctagggagactagtttcatcaccaacggctcatgcctgg 
                   
               
               
                   
                 ccagccgcaaaacttcctttatgatggctctgtgcctgagttcaatctac 
                   
               
               
                   
                 gaggacctgaagatgtatcaggtggaattcaaaaccatgaacgccaagct 
                   
               
               
                   
                 gctgatggaccccaaaaggcagatctttctggatcagaatatgctggctg 
                   
               
               
                   
                 tgattgacgagctgatgcaggcactgaacttcaattctgaaacagtcccc 
                   
               
               
                   
                 cagaagagctccctggaggaacctgatttctacaagactaaaatcaagct 
                   
               
               
                   
                 gtgcattctgctgcacgcttttaggatccgcgcagtgaccattgaccgcg 
                   
               
               
                   
                 tcatgtcttatctgaatgccagtcaccatcaccatcaccattggagccat 
                   
               
               
                   
                 cctcagtttgagaagtgataactcgag 
                   
               
               
                   
               
               
                 107 
                 gctagcgccaccatgcctctgctgctgctgctgccactgctgtgggctgg 
                 Sc IL-12 anti-EPCAM 
               
               
                   
                 cgcactggccatctgggagctgaagaaagacgtgtacgtggtcgaactgg 
                   
               
               
                   
                 actggtatcccgatgctcctggggagatggtggtcctgacatgcgacact 
                   
               
               
                   
                 cccgaggaagatggaatcacatggactctggatcagagctccgaggtcct 
                   
               
               
                   
                 gggaagcggcaaaaccctgacaattcaggtgaaggaattcggggacgccg 
                   
               
               
                   
                 gacagtacacatgtcacaagggcggggaggtgctgtctcacagtctgctg 
                   
               
               
                   
                 ctgctgcataagaaagaagacgggatctggtctaccgacattctgaaaga 
                   
               
               
                   
                 tcagaaggagcccaagaacaaaacattcctgaggtgcgaagccaaaaatt 
                   
               
               
                   
                 atagcggacgctttacctgttggtggctgaccacaatcagtaccgatctg 
                   
               
               
                   
                 acattttcagtcaagtctagtcggggctcaagcgaccctcagggagtgac 
                   
               
               
                   
                 atgcggagcagctactctgtctgccgagcgggtcagaggggataacaagg 
                   
               
               
                   
                 agtacgaatattctgtggagtgccaggaagacagtgcttgtccagcagcc 
                   
               
               
                   
                 gaggaaagcctgcccatcgaggtcatggtggatgcagtgcacaagctgaa 
                   
               
               
                   
                 atacgaaaactacacatcctctttctttattcgggacatcatcaagccag 
                   
               
               
                   
                 atccccctaagaacctgcagctgaaacccctgaagaatagcagacaggtc 
                   
               
               
                   
                 gaggtgtcctgggaataccccgacacttggagcacccctcatagttattt 
                   
               
               
                   
                 ctcactgaccttttgcgtccaggtgcagggcaagtctaaaagagagaaga 
                   
               
               
                   
                 aagacagggtcttcacagataagaccagcgccaccgtgatctgtagaaag 
                   
               
               
                   
                 aacgcatcaattagcgtgcgagcccaggatcggtactatagttcaagctg 
                   
               
               
                   
                 gagcgagtgggcctccgtgccatgctctggaggaggaggatcacaggtcc 
                   
               
               
                   
                 agctggtgcagagcggagcagaagtgaagaaacccggctcctctgtcaaa 
                   
               
               
                   
                 gtgagttgtaaggcctcaggcgggacttttagttcatacgcaatctctgt 
                   
               
               
                   
                 ggtcgtgaggcaggcaccaggacagggactggagtggatgggaggcatca 
                   
               
               
                   
                 ttcctatcttcggcaccgccaactacgctcagaagtttcaggggcgcgtg 
                   
               
               
                   
                 actattaccgccgatgagtccacatctactgcttatatggagctgagctc 
                   
               
               
                   
                 cctgagaagcgaagacaccgccgtgtactattgcgcaaggggcctgctgt 
                   
               
               
                   
                 ggaattactggggccaggggacactggtcaccgtgagcagcaaactgagt 
                   
               
               
                   
                 ggaagcgccagcgcccctaagctggaggaaggagagttcagtgaagcccg 
                   
               
               
                   
                 ggtcgagactaccctgacccagtcccctgctacactgtccgtgtctccag 
                   
               
               
                   
                 gagaacgcgctacactgagctgtcgagcaagtcagtcagtgtcaagcaat 
                   
               
               
                   
                 ctggctgtcgtgtaccagcagaagccaggccaggcacccagactgctgat 
                   
               
               
                   
                 ctatggggcaagcacccgggccacaggaattccagctagattcagcggat 
                   
               
               
                   
                 ccggctctgggaccgagtttaccctgacaatctcctctctgcagtccgaa 
                   
               
               
                   
                 gacttcgccgtgtactattgccagcagtacaacaattggccacccgggtt 
                   
               
               
                   
                 cacttttggacccggcaccaaagtcgatattaagggaggaggagggtccc 
                   
               
               
                   
                 ggaacctgcctgtggcaactcctgacccaggcatgttcccatgcctgcac 
                   
               
               
                   
                 cattcccagaacctgctgcgagccgtgagcaatatgctgcagaaagcacg 
                   
               
               
                   
                 gcagacactggagttttatccttgtactagcgaggaaatcgaccacgagg 
                   
               
               
                   
                 atattacaaaggataaaacttccaccgtggaagcctgcctgccactggag 
                   
               
               
                   
                 ctgactaagaacgaaagctgtctgaattcccgcgagacttctttcatcac 
                   
               
               
                   
                 caatggcagttgcctggcatcacgaaaaaccagctttatgatggccctgt 
                   
               
               
                   
                 gcctgagttcaatctacgaggacctgaagatgtatcaggtggaattcaaa 
                   
               
               
                   
                 acaatgaacgccaagctgctgatggaccctaaaaggcagatctttctgga 
                   
               
               
                   
                 tcagaatatgctggccgtgattgacgagctgatgcaggctctgaacttca 
                   
               
               
                   
                 atagcgaaactgtgccccagaagagctccctggaggaacctgatttctac 
                   
               
               
                   
                 aagaccaaaatcaagctgtgcattctgctgcacgcctttaggatccgcgc 
                   
               
               
                   
                 tgtcaccattgaccgcgtgatgtcctatctgaacgcctctcaccatcacc 
                   
               
               
                   
                 atcaccattggtcccatccacagtttgagaagtgataactcgag 
                   
               
               
                   
               
               
                 108 
                 YHWYGYTPQNVI 
                 EGFR binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 109 
                 YRWYGYTPQNVI 
                 EGFR binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 110 
                 PCAIWF 
                 VEGFR3 binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 111 
                 WVCSGG 
                 VEGFR3 binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 112 
                 NGRNGRNGR 
                 NGR motif 
               
               
                   
               
               
                 113 
                 RGDRGDRGD 
                 RGD motif 
               
               
                   
               
               
                 114 
                 TAASGVRSMH 
                 NG2 proteoglycan 
               
               
                   
                   
                 binding peptide 
               
               
                   
               
               
                 115 
                 LTLRWVGLMS 
                 NG2 proteoglycan 
               
               
                   
                   
                 binding peptide 
               
               
                   
               
               
                 116 
                 NKFNKGMRYWGALGGNGKRGIRGYM 
                 HER2 binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 117 
                 YEVHTYYLD 
                 EPCAM binding 
               
               
                   
                   
                 peptide 
               
               
                   
               
               
                 118 
                 ITMQIMRIKPHQGQHIGEMSF 
                 VEGFR binding 
               
               
                   
                   
                 peptide