MORPHOGEN-INDUCED PERIODONTAL TISSUE REGENERATION

Abstract: Disclosed are methods and compositions for inducing periodontal tissue morphogenesis in a mammal which include a therapeutically effective concentration of a morphogen. The methods and compositions are useful for integrating an implanted tooth in a tooth socket and for inhibiting tissue loss associated with periodontal disease or injury.

Description: MORPHOGEN-INDUCED PERIODONTAL TISSUE REGENERATION Background of the Invention This invention relates generally to the dental arts and more specifically to methods and compositions for treating and regenerating periodontal tissue. The peridontium is the cushioning tissue which anchors the tooth root to the mandibular or maxillar jawbone tissue by suspending the tooth in the tooth socket ("alveolus"). Periodontal tissue includes both the periodontal ligament, a collagen-containing tissue that is in contact with the bone tissue, and cementum, a mineralized tissue that covers the dental root surface. These two hard tissues are connected through the periodontal ligament fibers that run in a perpendicular direction to the two surfaces and thereby serve to anchor and suspend the tooth in the tooth socket, providing a shock-absorptive cushion between the tooth and the jawbone that accommodates the pressure applied to teeth when food is being chewed. Periodontal tissue loss may occur as a result of disease, including infectious diseases (e.g., gingivitis, caused by bacteria), nutritional diseases, e.g., scurvy, resulting from a vitamin deficiency, and a number of neoplastic diseases, including acute leukemia and lymphomas. The diseases are characterized by inflammation, bleeding and ulceration. Periodontal disease also may result from an opportunistic infection, e.g., in an immune-compromised individual. Left untreated, these diseases can cause significant periodontal tissue loss which loosen the tooth and ultimately can result in loss of the tooth and the alveolar bone tissue (periodontitis. ) Chronic periodontitis is the primary cause of tooth loss in adults. Current treatments include professional cleaning to remove plaque and tartar, use of oral antiseptics, local and/or systemic antibiotic therapies, and/or surgical procedures to remove periodontal pockets formed from periodontal tissue lesions and necrosis. Typically, where a tooth has been lost as a result of periodontitis, a prosthetic tooth or removable bridge is substituted for the natural tooth. Periodontal tissue loss also may occur as a result of mechanical injury to the tissue or to the tooth itself, particularly one causing tooth loss. Tooth loss also may occur as a result of any of a number of dental diseases, e.g., dental caries, pulpitis, or osteomyelitis. A viable tooth can be reimplanted if implantation occur quickly after loss, e.g. , within thirty minutes, and if th periodontal tissue within the tooth socket is still healthy However, if a significant period of time is allowed to elapse, the living periodontal tissue lining the tooth socket will be resorbed. In addition, the tooth itself begins to degenerate and a prosthetic tooth or removable bridge must be implanted. In the absence of healthy periodontal tissue the prosthetic implant is integrated directly into the jaw bone tissue in a condition called ankylosis (bone tissue in direct contact with dentin tissue.) The life of such prosthetic tooth implants often is limited due to the absence of viable periodontal tissue to enhance tooth anchoring and to absorb the impact of mastication on the prosthesis. It is an object of this invention to provide a means for inhibiting periodontal tissue loss, as well as means for inducing regeneration of damaged periodontal tissue. Another object is to provide means for inhibiting the periodontal tissue damage and tooth loss associated with periodontal and other gum diseases. Yet another object is to enhance integration of an implanted tooth, including a reimplanted natural tooth or tooth prosthesis, in the tooth socket. Still another object is to promote periodontal tissue growth around an implanted tooth. Another object is to inhibit ankylosis of an implanted tooth or tooth prosthesis. These and other objects and features of the invention will be obvious from the specification, drawings and claims which follow. Summary of the Invention The invention provides methods and compositions for inhibiting periodontal tissue loss in a mammal, particularl humans, including regenerating damaged tissue and/or inhibiting additional damage thereto. The methods and compositions of this invention may be used to prevent and/o inhibit tooth loss, as well as to enhance integration of an implanted tooth. As used herein, "implanted tooth" includes a natural tooth which has grown naturally in the tooth socket, a natural tooth which is reimplanted in a tooth socket, and a prosthetic tooth, which includes both natural teeth from which the root has been removed and replaced with an inert, biocompatible material, and "complete" prostheses made of natural or synthetic, non dentin-containing materials. In all cases, "tooth" refers to a natural or synthetic composition essentially defining the shape of a natural tooth, having a solid tooth body, including a crown and tooth root. "Reimplanted natural tooth" includes both an allogenic tooth, e.g., selected from a tooth bank; and a tooth autologous to the mammal, such as a tooth which has fallen out, been knocked out, or otherwise removed from the individual into which it is now being reimplanted. "Integrated tooth" means an implanted tooth with a living, substantially healthy periodontal tissue, including periodontal ligament and cementum, anchoring the tooth to the jaw bone. "Viable" tissue means living, substantially healthy tissue. "Viable tooth" refers to an implanted natural tooth with a living tooth root. "Periodontium" defines the tissues which surround the tooth in the tooth socket and includes both periodontal ligament and cementum. "Inhibit loss" of periodontal tissue, as used herein, means inhibiting damage to, and/or loss of, periodontal tissue. including periodontal ligament and/or cementum, and include regenerating lost or damaged tissue and/or inhibiting additional damage thereto. "Symptom alleviating cofactor" refers to one or more pharmaceuticals which may be administered together with the therapeutic agents of this invention and which alleviate or mitigate one or more of th symptoms typically associated with periodontal tissue loss. Exemplary cofactors include antibiotics, antiseptics, non- steroidal antiinflammatory agents, anaesthetics and analgesics. The methods and compositions of this invention include morphogenic protein ("morphogen") , as described herein, which, when provided to the tooth and/or jawbone surfaces i a tooth socket is capable of inducing periodontal tissue formation where periodontal tissue has been lost or damaged, and enhancing integration of an implanted tooth thereby. In one aspect, the invention features therapeutic treatment methods and compositions for inhibiting periodontal tissue loss in a mammal which include administering to the individual a therapeutically effective morphogen at a concentration and for a time sufficient to regenerate damaged periodontal tissue and/or to inhibit additional damage thereto. In another aspect, the invention features therapeutic treatment methods and compositions for inhibiting periodontal tissue loss in a mammal which include administering to the individual a compound that stimulates in vivo a therapeutically effective concentration of an endogenous morphogen in the body of the mammal sufficient to regenerate damaged periodontal tissue and/or to inhibit additional damage thereto. These compounds are referred to herein as morphogen-stimulating agents, and are understood to include substances which, when administered to a mammal, act on cells of tissue(s) or organ(s) that normally are responsible for, or capable of, producing a morphogen and/or secreting a morphogen, and which cause the endogenous level of the morphogen to be altered. The agent may act, for example, by stimulating expression and/or secretion of an endogenous morphogen. In preferred embodiments, the agent stimulates expression and/or secretion of an endogenous morphogen so as to increase amounts of the morphogen in the alveolar bone, periodontium or cementum tissue cells. In another aspect, the invention provides methods and compositions for enhancing the integration of an implanted tooth, particularly where the tooth socket is substantially reduced in viable periodontal tissue. In fact, the processes and compositions of the invention work well when a tooth socket has lost 30-50% of the periodontal ligament, and as much as 50-100% of the periodontal ligament. The methods and compositions include providing to the tooth or tooth socket surface a therapeutically effective concentration of a morphogen or morphogen-stimulating agent sufficient to induce morphogenesis of periodontal tissue. The implanted tooth may be an implanted tooth which has grown naturally in the socket and which is loose as a result of, for example, mechanical injury or due to a dental or periodontal disease. Alternatively, the implanted tooth may be a lost tooth or a tooth prosthesis which has been reimplanted in a vacant tooth socket. The tooth prosthesis may include a natural tooth from which a damaged or diseased root has been removed and replaced with a biocompatible, biologically inert material, as is created in a root canal procedure. The prosthetic tooth also may be composed of synthetic, non dentin-containing materials. The morphogen may be provided directly to the tooth surface to be implanted, and/or to the tooth socket to which the tooth is to be implanted. Where the morphogen is to be provided to the tissue socket, it may be provided by topical administration to the tooth socket surface or by local injection to periodontal or alveolar bone tissue associated with the socket. Alternatively, an agent capable of stimulating the production and/or secretion of a therapeutically effective concentration of an endogenous morphogen also may be provided to the tooth or tooth socket. Where the morphogen or morphogen stimulating agent (referred to herein collectively as "therapeutic agent") is provided to the tooth surface, it preferably is dispersed in a biocompatible, bioresorbable carrier, most preferably a carrier capable of retaining the therapeutic agent at the tissue surface and/or providing a controlled delivery of the agent to the tooth socket. The therapeutic agent also may be provided to the tooth socket itself, also preferably in association with a carrier capable of maintaining the agent in the tooth socket, and/or capable of enhancing the controlled delivery of the agent to the socket. Useful carriers include compositions having a high viscosity, such as that provided by glycerol and the like, as well as carrier materials formulated from extracellular matrices and/or which contain laminin, collagen, and/or biocompatible synthetic polymers, such as polybutyric, polylactic, polyglycolic acids and copolymers thereof. In addition, or alternatively, an acellular carrier material may be formulated from bone, dentin, cementum or periodontal tissue by demineralizing and guanidine-extracting the tissue essentially as described herein and/or in international application US92/01968 (W092/15323) . Particularly useful acellular matrices include dentin-derived, periodontal ligament-derived and cementum-derived matrices. In addition, the tooth to be implanted preferably comprises a porous exterior surface onto which the therapeutic agent may be adsorbed, and into which progenito and differentiating cementoblasts -can infiltrate and proliferate. Useful surfaces include natural tooth root surfaces, and porous prosthetic surfaces, including surface composed of matrix materials such as collagen, laminin, biocompatible polymers or metals such as titanium oxide. Where a natural tooth or dentin-containing prosthesis is to be implanted, the surface to be implanted first may be partially demineralized, e.g., by transient exposure to an acid to enhance the porosity of the tooth root surface. Preferably, where the tooth is to be implanted into a tooth socket, the socket has been freed of fibrous tissue which may have formed following tooth loss and periodontal tissue resorption. For example, the tooth socket may have undergone a healing period of several months after loss or removal of the tooth such that scar tissue has formed over the wound. In this case the healed socket preferably is surgically prepared for tooth implantation by removing the scar and other undesired tissue to expose the alveolar bone surface. Preferably, where the therapeutic agent is to be provided to enhance periodontal tissue viability surrounding an implanted tooth, the therapeutic agent is provided topically to the tissue surfaces between the tooth and gingiva. Alternatively, the agent may be injected locally , e.g., into the gingiva itself. The morphogens described herein may be used to inhibit periodontal tissue loss and/or to enhance viability of periodontal tissue at risk of damage due to a periodontal disease. The periodontal disease may be caused by an infectious agent, such as a bacterial, fungal or viral agent, or by a nutritional deficiency, including a vitamin deficiency. The morphogens also may be used to regenerate periodontal tissue lost as a result of a neoplastic disease, including squamous cell carcinomas, acute leukemias, lymphomas and metastatic tumors. A detailed description of diseases which damage or destroy periodontal tissue can be found, for example, in Harrison's Principles of Internal Medicine, 243-248, (McGraw-Hill 12th ed. 1991), the disclosure of which is incorporated herein by reference. The efficacy of the morphogens described herein in modulating an inflammatory response are described in detail in international application US92/07358 (W093/04692) . Although all individuals, and particularly adults, are at risk for periodontal tissue damage due to periodontal disease, a population most particularly at risk are immune- compromised individuals, such as individuals suffering from autoimmune diseases and/or whose immune system has been suppressed as part of a clinical procedure or therapy. Thus, in another aspect, the invention provides methods and compositions for inhibiting periodontal tissue loss in immune-compromised individuals. As described in international application W092/15323, and Example 2, below, the morphogens described herein also can induce formation of damaged or lost dentin tissue. Accordingly, where a natural tooth or dentin-containing prosthesis is to be implanted, a morphogen or morphogen- stimulating agent also may be provided to damaged areas of the tooth to induce dentin regeneration of damaged or lost dentin tissue. The morphogen may be provided topically or otherwise administered to the tooth tissue. For example, the morphogen may be dispersed in a biocompatible, porous carrier material that then is provided topically to the damaged dentin tissue. A useful carrier may be formulated from dentin by demineralizing and guanidine-extracting the tissue to create an acellular matrix. The morphogens and morphogen-stimulating agents also may be provided to the periodontium together with other molecules ("cofactors") known to have a beneficial effect in treating damaged periodontal tissue, particularly cofactors capable of mitigating or alleviating symptoms typically associated with periodontal tissue damage and/or loss. Examples of such cofactors include antiseptics such as chlorohexidine and tibezonium iodide, antibiotics, including tetracycline, aminoglycosides, macrolides, penicillins and cephalosporins, anaesthetics and analgesics, and other non- steroidal anti-inflammatory agents. Among the morphogens useful in this invention are proteins originally identified as osteogenic proteins (see U.S. Patent 5,011,691, incorporated herein by reference), such as the OP-1, OP-2 and CBMP2 proteins, as well as amino acid sequence-related proteins such as DPP (from Drosophila), Vgl (from Xenopus), Vgr-1 (from mouse), GDF-1 (from mouse, see Lee (1991) PNAS 8 :4250-4254) , all of which are presented in Table II and Seq. ID Nos. 5-14, and the recently identified 60A protein (from Drosophila, Seq. ID No. 24, see Wharton et al. (1991) PNAS 88;9214-9218. ) The members of this family, which include members of the TGF-β super-family of proteins, share substantial amino acid sequence homology in their C-terminal regions. The proteins are translated as a precursor, having an N-terminal signal peptide sequence, typically less than about 30 residues, followed by a "pro" domain that is cleaved to yield the mature sequence. The "pro" form of the protein includes the pro domain and the mature domain, and forms a soluble species that appears to be the primary form secreted from cultured mammalian cells. The signal peptide is cleaved rapidly upon translation, at a cleavage site that can be predicted in a given sequence using the method of Von Heijne ((1986) Nucleic Acids Research 14;4683-4691. ) Table I, below, describes the various morphogens identified to date, including their nomenclature as used herein, their Seq. ID references, and publication sources for the amino acid sequences for the full length proteins not included in the Seq. Listing. The disclosure of these publications is incorporated herein by reference. TABLE I "OP-1" Refers generically to the group of morphogenically active proteins expressed from part or all of a DNA sequence encoding OP-1 protein, including allelic and species variants thereof, e.g., human OP-1 ("hOP-1", Seq. ID No. 5, mature protein amino acid sequence), or mouse OP-1 ("mOP-1", Seq. ID No. 6, mature protein amino acid sequence. ) The conserved seven cysteine skeleton is defined by residues 38 to 139 of Seq. ID Nos. 5 and 6. The cDNA sequences and the amino acids encoding the full length proteins are provided in Seq. Id Nos. 16 and 17 (hOPl) and Seq. ID Nos. 18 and 19 (mOPl.) The mature proteins are defined by residues 293-431 (hOPl) and 292-430 (mOPl). The "pro" regions of the proteins, cleaved to yield the mature, morphogenically active proteins are defined essentially by residues 30-292 (hOPl) and residues 30-291 (mOPl). "OP-2" Refers generically to the group of active proteins expressed from part or all of a DNA sequence encoding OP-2 protein, including allelic and species variants thereof, e.g., human OP-2 ("hOP-2", Seq. ID No. 7, mature protein amino acid sequence) or mouse OP-2 ("mOP-2", Seq. ID No. 8, mature protein amino acid sequence). The conserved seven cysteine skeleton is defined by residues 38 to 139 of Seq. ID Nos. 7 and 8. The cDNA sequences and the amino acids encoding the full length proteins are provided in Seq. ID Nos. 20 and 2 (hOP2) and Seq. ID Nos. 22 and 23 (mOP2.) The mature proteins are defined essentially by residues 264-402 (hOP2) and 261-399 (mOP2). The "pro" regions of the proteins, cleaved to yield the mature, morphogenically active proteins are defined essentially by residues 18-263 (hOP2) and residues 18-260 (mOPl). "CBMP2" Refers generically to the morphogenically active proteins expressed from a DNA sequence encoding the CBMP2 proteins, including allelic and species variants thereof, e.g., human CBMP2A ("CBMP2A(fx)", Seq ID No. 9) or human CBMP2B DNA ("CBMP2B(fx)", Seq. ID No. 10). Th amino acid sequence for the full length proteins, referred to in the literature as BMP2A and BMP2B, or BMP2 and BMP4, appear in Wozney, et al. (1988) Science 242;1528-1534. The pro domain for BMP2 (BMP2A) likely includes residues 25-248; the mature protein, residues 249-396. The pro domain for BMP4 (BMP2B) likely includes residues 25-256; the mature protein, residues 257-408. "DPP(fx)" refers to protein sequences encoded by the Drosophila DPP gene and defining the conserved seven cysteine skeleton (Seq. ID No. 11). The amino acid sequence for the full length protei appears in Padgett, et al (1987) Nature 325: 81-84. The pro domain likely extends from the signal peptide cleavage site to residue 456; the mature protein likely is defined by residues 457-588. "Vgl(fx)" refers to protein sequences encoded by the Xenopus Vgl gene and defining the conserved seven cysteine skeleton (Seq. ID No. 12). The amino acid sequence for the full length protein appears in Weeks (1987) Cell 51: 861-867. The prodomain likely extends from the signal peptide cleavage site to residue 246; the mature protein likely is defined by residues 247-360. "Vgr-l(fx)" refers to protein sequences encoded by the murine Vgr-1 gene and defining the conserved seven cysteine skeleton (Seq. ID No. 13). The amino acid sequence for the full length protein appears in Lyons, et al, (1989) PNAS 86: 4554- 4558. The prodomain likely extends from the signal peptide cleavage site to residue 299; the mature protein likely is defined by residues 300-438. "GDF-l(fx)" refers to protein sequences encoded by the human GDF-1 gene and defining the conserved seven cysteine skeleton (Seq. ID No. 14). The cDNA and encoded amino sequence for the full length protein is provided in Seq. ID. No. 32. The prodomain likely extends from the signal peptide cleavage site to residue 214; the mature protein likely is defined by residues 215-372. "60A" refers generically to the morphogenically active proteins expressed from part or all of DNA sequence (from the Drosophila 60A gene) encoding the 60A proteins (see Seq. ID No. 24 wherein the cDNA and encoded amino acid sequence for the full length protein is provided). "60A(fx)" refers to the protein sequences defining the conserved seven cystein skeleton (residues 354 to 455 of Seq. ID No. 24.) The prodomain likely extends from the signal peptide cleavage site to residue 324; the mature protein likely is defined by residues 325-455. "BMP3(fx)" refers to protein sequences encoded by the human BMP3 gene and defining the conserved seven cysteine skeleton (Seq. ID No. 26). The amino acid sequence for the full length protein appears in Wozney et al. (1988) Science 242: 1528-1534. The pro domain likely extends from the signal peptide cleavage site to residue 290; the mature protein likely is defined by residues 291-472. "BMP5(fx)" refers to protein sequences encoded by the human BMP5 gene and defining the conserved seven cysteine skeleton (Seq. ID No. 27). The amino acid sequence for the full length protein appears in Celeste, et al. (1991) PNAS 87: 9843-9847. The pro domain likely extends from the signal peptide cleavage site to residue 316; the mature protein likely is defined by residues 317-454. "BMP6(fx)" refers to protein sequences encoded by the human BMP6 gene and defining the conserved seven cysteine skeleton (Seq. ID No. 28). The amino acid sequence for the full length protein appears in Celeste, et al. (1990) PNAS 87: 9843-5847. The pro domain likely includes extends from the signal peptide cleavage site to residue 374; the mature sequence likely includes residues 375-513. The OP-2 proteins have an additional cysteine residue in the conserved region (e.g., see residue 41 of Seq. ID Nos. 7 and 8) , in addition to the conserved cysteine skeleton in common with the other proteins in this family. The GDF-1 protein has a four amino acid insert within the conserved skeleton (residues 44-47 of Seq. ID No. 14) but this insert likely does not interfere with the relationship of the cysteines in the folded structure. In addition, the CBMP2 proteins are missing one amino acid residue within the cysteine skeleton. The morphogens are inactive when reduced, but are active as oxidized homodimers and when oxidized in combination with other morphogens of this invention. Thus, as defined herein, a morphogen is a dimeric protein comprising a pair of polypeptide chains, wherein each polypeptide chain comprises at least the C-terminal six cysteine skeleton defined by residues 43-139 of Seq. ID No. 5, including functionally equivalent arrangements of these cysteines (e.g., amino acid insertions or deletions which alter the linear arrangement of the cysteines in the sequence but not their relationship in the folded structure), such that, whe the polypeptide chains are folded, the dimeric protein species comprising the pair of polypeptide chains has the appropriate three-dimensional structure, including the appropriate intra- and/or inter-chain disulfide bonds such that the protein is capable of acting as a morphogen as defined herein. Specifically, the morphogens generally are capable of all of the following biological functions in a morphogenically permissive environment: stimulating proliferation of progenitor cells; stimulating the differentiation of progenitor cells; stimulating the proliferation of differentiated cells; and supporting the growth and maintenance of differentiated cells. In addition, it is also anticipated that these morphogens are capable of inducing redifferentiation of committed cells under appropriate environmental conditions. In one preferred aspect, the morphogens of this invention comprise one of two species of generic amino acid sequences: Generic Sequence 1 (Seq. ID No. 1) or Generic Sequence 2 (Seq. ID No. 2); where each Xaa indicates one of the 20 naturally-occurring L-isomer, α-amino acids or a derivative thereof. Generic Sequence 1 comprises the conserved six cysteine skeleton and Generic Sequence 2 comprises the conserved six cysteine skeleton plus the additional cysteine identified in OP-2 (see residue 36, Seq. ID No. 2). In another preferred aspect, these sequences further comprise the following additional sequence at their N-terminus: Cys Xaa Xaa Xaa Xaa (Seq. ID No. 15) 1 5 Preferred amino acid sequences within the foregoing generic sequences include: Generic Sequence 3 (Seq. ID No. 3), Generic Sequence 4 (Seq. ID No. 4), Generic Sequenc 5 (Seq. ID No. 30) and Generic Sequence 6 (Seq. ID No. 31), listed below. These Generic Sequences accommodate the homologies shared among the various preferred members of this morphogen family identified in Table II, as well as th amino acid sequence variation among them. Generic Sequence 3 and 4 are composite amino acid sequences of the proteins presented in Table II and identified in Seq. ID Nos. 5-14, specifically: human OP-1 (hOP-1, Seq. ID Nos. 5 and 16-17), mouse OP-1 (mOP-1, Seq. ID Nos. 6 and 18-19), human and mouse OP-2 (Seq. ID Nos. 7, 8, and 20-22), CBMP2A (Seq. ID No. 9), CBMP2B (Seq. ID No. 10), DPP (from Drosophila, Seq. ID No. 11), Vgl, (from Xenopus, Seq. ID No. 12), Vgr-1 (fro mouse, Seq. ID No. 13), and GDF-1 (from mouse, Seq. ID No. 14.) The generic sequences include both the amino acid identity shared by the sequences in Table II, as well as alternative residues for the variable positions within the sequence. Note that these generic sequences allow for an additional cysteine at position 41 or 46 in Generic Sequences 3 or 4, respectively, providing an appropriate cysteine skeleton where inter- or intramolecular disulfide bonds can form, and contain certain critical amino acids which influence the tertiary structure of the proteins. Generic Sequence 3 Leu Tyr Val Xaa Phe 1 5 Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa 10 Xaa Ala Pro Xaa Gly Xaa Xaa Ala 15 20 Xaa Tyr Cys Xaa Gly Xaa Cys Xaa 25 30 Xaa Pro Xaa Xaa Xaa Xaa Xaa 35 Xaa Xaa Xaa Asn His Ala Xaa Xaa 40 45 Xaa Xaa Leu Xaa Xaa Xaa Xaa Xaa 50 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys 55 60 Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa 65 Xaa Xaa Xaa Leu Xaa Xaa Xaa 70 75 Xaa Xaa Xaa Xaa Val Xaa Leu Xaa 80 Xaa Xaa Xaa Xaa Met Xaa Val Xaa 85 90 Xaa Cys Gly Cys Xaa 95 wherein each Xaa is independently selected from a group of one or more specified amino acids defined as follows: "Res." means "residue" and Xaa at res.4 = (Ser, Asp or Glu); Xaa at res.6 = (Arg, Gin, Ser or Lys); Xaa at res.7 = (Asp or Glu); Xaa at res.8 = (Leu or Val); Xaa at res.11 = (Gin, Leu, Asp, His or Asn); Xaa at res.12 = (Asp, Arg or Asn); Xaa at res.14 = (lie or Val); Xaa at res.15 = (lie or Val); Xaa at res.18 = (Glu, Gin, Leu, Lys, Pro or Arg); Xaa at res.20 = (Tyr or Phe); Xaa at res.21 = (Ala, Ser, Asp, Met, His, Leu or Gin); Xaa at res.23 = (Tyr, Asn or Phe); Xaa at res.26 = (Glu, His, Tyr, Asp or Gin); Xaa at res.28 = (Glu, Lys, Asp or Gin); Xaa at res.30 = (Ala, Ser, Pro or Gin); Xaa at res.31 = (Phe, Leu or Tyr); Xaa at res.33 = (Leu or Val); Xaa at res.34 = (Asn, Asp, Ala or Thr); Xaa at res.35 = (Ser, Asp, Glu, Leu or Ala); Xaa at res.36 = (Tyr, Cys, His, Ser or lie); Xaa at res.37 = (Met, Phe, Gly or Leu); Xaa at res.38 = (Asn or Ser); Xaa at res.39 = (Ala, Ser or Gly); Xaa at res.40 = (Thr, Leu or Ser); Xaa at res.44 = (lie or Val); Xaa at res.45 = (Val or Leu); Xaa at res.46 = (Gin or Arg); Xaa at res.47 = (Thr, Ala or Ser); Xaa at res.49 = (Val or Met); Xaa at res.50 = (His or Asn); Xaa at res.51 - (Phe, Leu, Asn, Ser, Ala or Val); Xaa at res.52 = (lie. Met, Asn, Ala or Val); Xaa at res.53 = (Asn, Lys, Ala or Glu); Xaa at res.54 = (Pro or Ser); Xaa at res.55 = (Glu, Asp, Asn, or Gly); Xaa at res.56 = (Thr, Ala, Val, Lys, Asp, Tyr, Ser or Ala); Xaa at res.57 = (Val, Ala or lie); Xaa at res.58 = (Pro or Asp); Xaa at res.59 = (Lys or Leu); Xaa at res.60 = (Pro or Ala); Xaa at res.63 = (Ala or Val); Xaa at res.65 = (Thr or Ala); Xaa at res.66 = (Gin, Lys, Arg or Glu); Xaa at res.67 = (Leu, Met or Val); Xaa at res.68 = (Asn, Ser or Asp); Xaa at res.69 = (Ala, Pro or Ser); Xaa at res.70 = (lie, Thr or Val); Xaa at res.71 = (Ser or Ala); Xaa at res.72 = (Val or Met); Xaa at res.74 = (Tyr or Phe); Xaa at res.75 = (Phe, Tyr or Leu); Xaa at res.76 = (Asp or Asn); Xaa at res.77 = (Asp, Glu, Asn or Ser); Xaa at res.78 = (Ser, Gin, Asn or Tyr); Xaa at res.79 = (Ser, Asn, Asp or Glu); Xaa at res.80 = (Asn, Thr or Lys); Xaa at res.82 = (lie or Val); Xaa at res.84 = (Lys or Arg); Xaa at res.85 = (Lys, Asn, Gin or His); Xaa at res.86 = (Tyr or His); Xaa at res.87 = (Arg, Gin or Glu); Xaa at res.88 = (Asn, Glu or Asp); Xaa at res.90 = (Val, Thr or Ala); Xaa at res.92 = (Arg, Lys, Val, Asp or Glu); Xaa at res.93 = (Ala, Gly or Glu); and Xaa at res.97 = (His or Arg); Generic Sequence 4 Cys Xaa Xaa Xaa Xaa Leu Tyr Val Xaa Phe 1 5 10 Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa 15 Xaa Ala Pro Xaa Gly Xaa Xaa Ala 20 25 Xaa Tyr Cys Xaa Gly Xaa Cys Xaa 30 35 Xaa Pro Xaa Xaa Xaa Xaa Xaa 40 Xaa Xaa Xaa Asn His Ala Xaa Xaa 45 50 Xaa Xaa Leu Xaa Xaa Xaa Xaa Xaa 55 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys 60 65 Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa 70 Xaa Xaa Xaa Leu Xaa Xaa Xaa 75 80 Xaa Xaa Xaa Xaa Val Xaa Leu Xaa 85 Xaa Xaa Xaa Xaa Met Xaa Val Xaa 90 95 Xaa Cys Gly Cys Xaa 100 wherein each Xaa is independently selected from a group of one or more specified amino acids as defined by the following: "Res." means "residue" and Xaa at res.2 = (Lys or Arg); Xaa at res.3 = (Lys or Arg); Xaa at res.4 = (His or Arg); Xaa at res.5 = (Glu, Ser, His, Gly, Arg or Pro); Xaa at res.9 = (Ser, Asp or Glu); Xaa at res.11 = (Arg, Gin, Ser or Lys); Xaa at res.12 = (Asp or Glu); Xaa at res.13 = (Leu or Val); Xaa at res.16 = (Gin, Leu, Asp, His or Asn); Xaa at res.17 = (Asp, Arg, or Asn); Xaa at res.19 = (lie or Val); Xaa at res.20 = (lie or Val); Xaa at res.23 = (Glu, Gin, Leu, Lys, Pro or Arg); Xaa at res.25 = (Tyr or Phe); Xaa at res.26 = (Ala, Ser, Asp, Met, His, Leu, or Gin); Xaa at res.28 = (Tyr, Asn or Phe); Xaa at res.31 = (Glu, His, Tyr, Asp or Gin); Xaa at res.33 = Glu, Lys, Asp or Gin); Xaa at res.35 = (Ala, Ser or Pro); Xaa at res.36 = (Phe, Leu or Tyr); Xaa at res.38 = (Leu or Val); Xaa at res.39 = (Asn, Asp, Ala or Thr); Xaa at res.40 = (Ser, Asp, Glu, Leu or Ala); Xaa at res.41 = (Tyr, Cys, His, Ser or lie); Xaa at res.42 = (Met, Phe, Gly or Leu); Xaa at res.44 = (Ala, Ser or Gly); Xaa at res.45 = (Thr, Leu or Ser); Xaa at res.49 = (lie or Val); Xaa at res.50 = (Val or Leu); Xaa at res.51 = (Gin or Arg); Xaa at res.52 = (Thr, Ala or Ser); Xaa at res.54 = (Val or Met); Xaa at res.55 = (His or Asn); Xaa at res.56 = (Phe, Leu, Asn, Ser, Ala or Val); Xaa at res.57 = (He, Met, Asn, Ala or Val); Xaa at res.58 = (Asn, Lys, Ala or Glu); Xaa at res.59 = (Pro or Ser); Xaa at res.60 = (Glu, Asp, or Gly); Xaa at res.61 = (Thr, Ala, Val, Lys, Asp, Tyr, Ser or Ala); Xaa at res.62 = (Val, Ala or He); Xaa at res.63 = (Pro or Asp); Xaa at res.64 = (Lys or Leu); Xaa at res.65 = (Pro or Ala); Xaa at res.68 = (Ala or Val); Xaa at res.70 = (Thr or Ala); Xaa at res.71 = (Gin, Lys, Arg or Glu); Xaa at res.72 = (Leu, Met or Val); Xaa at res.73 = (Asn, Ser or Asp); Xaa at res.74 = (Ala, Pro or Ser); Xaa at res.75 = (He, Thr or Val); Xaa at res.76 = (Ser or Ala); Xaa at res.77 = (Val or Met); Xaa at res.79 = (Tyr or Phe); Xaa at res.80 = (Phe, Tyr or Leu); Xaa at res.81 = (Asp or Asn); Xaa at res.82 = (Asp, Glu, Asn or Ser); Xaa at res.83 = (Ser, Gin, Asn or Tyr); Xaa at res.84 = (Ser, Asn, Asp or Glu); Xaa at res.85 = (Asn, Thr or Lys); Xaa at res.87 = (He or Val); Xaa at res.89 = (Lys or Arg); Xaa at res.90 = (Lys, Asn, Gin or His); Xaa at res.91 = (Tyr or His); Xaa at res.92 = (Arg, Gin or Glu); Xaa at res.93 = (Asn, Glu or Asp); Xaa at res.95 = (Val, Thr or Ala); Xaa at res.97 = (Arg, Lys, Val, Asp or Glu); Xaa at res.98 = (Ala, Gly or Glu); and Xaa at res.102 = (His or Arg). Similarly, Generic Sequence 5 (Seq. ID No. 30) and Generic Sequence 6 (Seq. ID No. 31) accommodate the homologies shared among all the morphogen protein family members identified in Table II. Specifically, Generic Sequences 5 and 6 are composite amino acid sequences of human OP-1 (hOP-1, Seq. ID Nos. 5 and 16- 17), mouse OP-1 (mOP-1, Seq. ID Nos. 6 and 18-19), human and mouse OP-2 (Seq. ID Nos. 7, 8, and 20-22), CBMP2A (Seq. ID No. 9), CBMP2B (Seq. ID No. 10), DPP (from Drosophila, Seq. ID No. 11), Vgl, (from Xenopus, Seq. ID No. 12), Vgr-1 (from mouse, Seq. ID No. 13), and GDF-1 (from mouse, Seq. ID No. 14), human BMP3 (Seq. ID No. 26), human BMP5 (Seq. ID No. 27), human BMP6 (Seq. ID No. 28) and 60(A) (from Drosophila, Seq. ID Nos. 24-25). The generic sequences include both the amino acid identity shared by these sequences in the C-terminal domain, defined by the six and seven cysteine skeletons (Generic Sequences 5 and 6, respectively), as well as alternative residues for the variable positions within the sequence. As for Generic Sequences 3 and 4, Generic Sequences 5 and 6 allow for an additional cysteine at position 41 (Generic Sequence 5) or position 46 (Generic Sequence 6), providing an appropriate cysteine skeleton where inter- or intramolecular disulfide bonds can form, and containing certain critical amino acids which influence the tertiary structure of the proteins. Generic Sequence 5 Leu Xaa Xaa Xaa Phe 1 5 Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa 10 Xaa Xaa Pro Xaa Xaa Xaa Xaa Ala 15 20 Xaa Tyr Cys Xaa Gly Xaa Cys Xaa 25 30 Xaa Pro Xaa Xaa Xaa Xaa Xaa 35 Xaa Xaa Xaa Asn His Ala Xaa Xaa 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 50 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys 55 60 Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa 65 Xaa Xaa Xaa Leu Xaa Xaa Xaa 70 75 Xaa Xaa Xaa Xaa Val Xaa Leu Xaa 80 Xaa Xaa Xaa Xaa Met Xaa Val Xaa 85 90 Xaa Cys Xaa Cys Xaa 95 wherein each Xaa is independently selected from a group of one or more specified amino acids defined as follows: "Res." means "residue" and Xaa at res.2 = (Tyr or Lys); Xaa at res.3 = Val or He); Xaa at res.4 = (Ser, Asp or Glu); Xaa at res.6 = (Arg, Gin, Ser, Lys or Ala); Xaa at res.7 = (Asp, Glu or Lys); Xaa at res.8 = (Leu, Val or He); Xaa at res.11 = (Gin, Leu, Asp, His, Asn or Ser); Xaa at res.12 = (Asp, Arg, Asn or Glu); Xaa at res.14 = (He or Val); Xaa at res.15 = (He or Val); Xaa at res.16 (Ala or Ser); Xaa at res.18 = (Glu, Gin, Leu, Lys, Pro or Arg); Xaa at res.19 = (Gly or Ser); Xaa at res.20 = (Tyr or Phe); Xaa at res.21 = (Ala, Ser, Asp, Met, His, Gin, Leu or Gly); Xaa at res.23 = (Tyr, Asn or Phe); Xaa at res.26 = (Glu, His, Tyr, Asp, Gin or Ser); Xaa at res.28 = (Glu, Lys, Asp, Gin or Ala); Xaa at res.30 = (Ala, Ser, Pro, Gin or Asn); Xaa at res.31 = (Phe, Leu or Tyr); Xaa at res.33 = (Leu, Val or Met); Xaa at res.34 = (Asn, Asp, Ala, Thr or Pro); Xaa at res.35 = (Ser, Asp, Glu, Leu, Ala or Lys); Xaa at res.36 = (Tyr, Cys, His, Ser or He); Xaa at res.37 = (Met, Phe, Gly or Leu); Xaa at res.38 = (Asn, Ser or Lys); Xaa at res.39 = (Ala, Ser, Gly or Pro); Xaa at res.40 = (Thr, Leu or Ser); Xaa at res.44 = (He, Val or Thr); Xaa at res.45 = (Val, Leu or He); Xaa at res.46 = (Gin or Arg); Xaa at res.47 = (Thr, Ala or Ser); Xaa at res.48 = (Leu or He); Xaa at res.49 = (Val or Met); Xaa at res.50 = (His, Asn or Arg); Xaa at res.51 = (Phe, Leu, Asn, Ser, Ala or Val); Xaa at res.52 = (He, Met, Asn, Ala, Val or Leu); Xaa at res.53 = (Asn, Lys, Ala, Glu, Gly or Phe); Xaa at res.54 = (Pro, Ser or Val); Xaa at res.55 = (Glu, Asp, Asn, Gly, Val or Lys); Xaa at res.56 = (Thr, Ala, Val, Lys, Asp, Tyr, Ser, Ala, Pro or His); Xaa at res.57 = (Val, Ala or He); Xaa at res.58 = (Pro or Asp); Xaa at res.59 = (Lys, Leu or Glu); Xaa at res.60 = (Pro or Ala); Xaa at res.63 = (Ala or Val); Xaa at res.65 = (Thr, Ala or Glu); Xaa at res.66 = (Gin, Lys, Arg or Glu); Xaa at res.67 = (Leu, Met or Val); Xaa at res.68 = (Asn, Ser, Asp or Gly); Xaa at res.69 = (Ala, Pro or Ser); Xaa at res.70 = (He, Thr, Val or Leu); Xaa at res.71 = (Ser, Ala or Pro); Xaa at res.72 = (Val, Met or He); Xaa at res.74 = (Tyr or Phe); Xaa at res.75 = (Phe, Tyr, Leu or His); Xaa at res.76 = (Asp, Asn or Leu); Xaa at res.77 = (Asp, Glu, Asn or Ser); Xaa at res.78 = (Ser, Gin, Asn, Tyr or Asp); Xaa at res.79 = (Ser, Asn, Asp, Glu or Lys); Xaa at res.80 = (Asn, Thr or Lys); Xaa at res.82 = (He, Val or Asn); Xaa at res.84 = (Lys or Arg); Xaa at res.85 = (Lys, Asn, Gin, His or Val); Xaa at res.86 = (Tyr or His); Xaa at res.87 = (Arg, Gin, Glu or Pro); Xaa at res.88 = (Asn, Glu or Asp); Xaa at res.90 = (Val, Thr, Ala or He); Xaa at res.92 = (Arg, Lys, Val, Asp or Glu); Xaa at res.93 = (Ala, Gly, Glu or Ser); Xaa at res.95 = (Gly or Ala) and Xaa at res.97 = (His or Arg). Generic Sequence 6 Cys Xaa Xaa Xaa Xaa Leu Xaa Xaa Xaa Phe 1 5 10 Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa 15 Xaa Xaa Pro Xaa Xaa Xaa Xaa Ala 20 25 Xaa Tyr Cys Xaa Gly Xaa Cys Xaa 30 35 Xaa Pro Xaa Xaa Xaa Xaa Xaa 40 Xaa Xaa Xaa Asn His Ala Xaa Xaa 45 50 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 55 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys 60 65 Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa 70 Xaa Xaa Xaa Leu Xaa Xaa Xaa 75 80 Xaa Xaa Xaa Xaa Val Xaa Leu Xaa 85 Xaa Xaa Xaa Xaa Met Xaa Val Xaa 90 95 Xaa Cys Xaa Cys Xaa 100 wherein each Xaa is independently selected from a group of one or more specified amino acids as defined by the following: "Res." means "residue" and Xaa at res.2 = (Lys, Arg, Ala or Gin); Xaa at res.3 = (Lys, Arg or Met); Xaa at res.4 = (His, Arg or Gin); Xaa at res.5 = (Glu, Ser, His, Gly, Arg, Pro, Thr, or Tyr); Xaa at res.7 = (Tyr or Lys); Xaa at res.8 = (Val or He); Xaa at res.9 = (Ser, Asp or Glu); Xaa at res.11 = (Arg, Gin, Ser, Lys or Ala); Xaa at res.12 = (Asp, Glu, or Lys); Xaa at res.13 = (Leu, Val or He); Xaa at res.16 = (Gin, Leu, Asp, His, Asn or Ser); Xaa at res.17 = (Asp, Arg, Asn or Glu); Xaa at res.19 = (He or Val); Xaa at res.20 = (He or Val); Xaa at res.21 = (Ala or Ser); Xaa at res.23 = (Glu, Gin, Leu, Lys, Pro or Arg); Xaa at res.24 = (Gly or Ser); Xaa at res.25 = (Tyr or Phe); Xaa at res.26 = (Ala, Ser, Asp, Met, His, Gin, Leu, or Gly); Xaa at res.28 = (Tyr, Asn or Phe); Xaa at res.31 = (Glu, His, Tyr, Asp, Gin or Ser); Xaa at res.33 = Glu, Lys, Asp, Gin or Ala); Xaa at res.35 = (Ala, Ser, Pro, Gin or Asn); Xaa at res.36 = (Phe, Leu or Tyr); Xaa at res.38 = (Leu, Val or Met); Xaa at res.39 = (Asn, Asp, Ala, Thr or Pro); Xaa at res.40 = (Ser, Asp, Glu, Leu, Ala or Lys); Xaa at res.41 = (Tyr, Cys, His, Ser or He); Xaa at res.42 = (Met, Phe, Gly or Leu); Xaa at res.43 = (Asn, Ser or Lys); Xaa at res.44 = (Ala, Ser, Gly or Pro); Xaa at res.45 = (Thr, Leu or Ser); Xaa at res.49 = (He, Val or Thr); Xaa at res.50 = (Val, Leu or He); Xaa at res.51 = (Gin or Arg); Xaa at res.52 = (Thr, Ala or Ser); Xaa at res.53 = (Leu or He); Xaa at res.54 = (Val or Met); Xaa at res.55 = (His, Asn or Arg); Xaa at res.56 = (Phe, Leu, Asn, Ser, Ala or Val); Xaa at res.57 = (He, Met, Asn, Ala, Val or Leu); Xaa at res.58 = (Asn, Lys, Ala, Glu, Gly or Phe); Xaa at res.59 = (Pro, Ser or Val); Xaa at res.60 = (Glu, Asp, Gly, Val or Lys); Xaa at res.61 = (Thr, Ala, Val, Lys, Asp, Tyr, Ser, Ala, Pro or His); Xaa at res.62 = (Val, Ala or He); Xaa at res.63 = (Pro or Asp); Xaa at res.64 = (Lys, Leu or Glu); Xaa at res.65 = (Pro or Ala); Xaa at res.68 = (Ala or Val); Xaa at res.70 = (Thr, Ala or Glu); Xaa at res.71 = (Gin, Lys, Arg or Glu); Xaa at res.72 = (Leu, Met or Val); Xaa at res.73 = (Asn, Ser, Asp or Gly); Xaa at res.74 = (Ala, Pro or Ser); Xaa at res.75 = (He, Thr, Val or Leu); Xaa at res.76 = (Ser, Ala or Pro); Xaa at res.77 = (Val, Met or He); Xaa at res.79 = (Tyr or Phe); Xaa at res.80 = (Phe, Tyr, Leu or His); Xaa at res.81 = (Asp, Asn or Leu); Xaa at res.82 = (Asp, Glu, Asn or Ser); Xaa at res.83 = (Ser, Gin, Asn, Tyr or Asp); Xaa at res.84 = (Ser, Asn, Asp, Glu or Lys); Xaa at res.85 = (Asn, Thr or Lys); Xaa at res.87 = (He, Val or Asn); Xaa at res.89 = (Lys or Arg); Xaa at res.90 = (Lys, Asn, Gin, His or Val); Xaa at res.91 = (Tyr or His); Xaa at res.92 = (Arg, Gin, Glu or Pro); Xaa at res.93 = (Asn, Glu or Asp); Xaa at res.95 = (Val, Thr, Ala or He); Xaa at res.97 = (Arg, Lys, Val, Asp or Glu); Xaa at res.98 = (Ala, Gly, Glu or Ser); Xaa at res.100 = (Gly or Ala); and Xaa at res.102 = (His or Arg) . Particularly useful sequences for use as morphogens in this invention include the C-terminal domains, e.g., the C- terminal 96-102 amino acid residues of Vgl, Vgr-1, DPP, OP-1, OP-2, CBMP-2A, CBMP-2B, GDF-1 (see Table II, below, and Seq. ID Nos. 5-14), as well as proteins comprising the C-terminal domains of 60A, BMP3, BMP5 and BMP6 (see Seq. ID Nos. 24-28), all of which include at least the conserved six or seven cysteine skeleton. In addition, biosynthetic constructs designed from the generic sequences, such as COP-1, 3-5, 7, 16, disclosed in U.S. Pat. No. 5,011,691, also are useful. Other sequences include the inhibins/activin proteins (see, for example, U.S. Pat. Nos. 4,968,590 and 5,011,691). Accordingly, other useful sequences are those sharing at least 70% amino acid sequence homology or "similarity", and preferably 80% homology or similarity with any of the sequences above. These are anticipated to include allelic, species variants and other sequence variants (e.g., including "muteins" or "mutant proteins"), whether naturally-occurring or biosynthetically produced, as well as novel members of this morphogenic family of proteins. As used herein, "amino acid sequence homology" is understood to mean amino acid sequence similarity, and homologous sequences share identical or similar amino acids, where similar amino acids are conserved amino acids as defined by Dayoff et al.. Atlas of Protein Sequence and Structure; vol.5, Suppl.3, pp.345-362 (M.O. Dayoff, ed., Nat'l BioMed. Research Fdn., Washington D.C. 1978.) Thus, a candidate sequence sharing 70% amino acid homology with a reference sequence requires that, following alignment of the candidate sequence with the reference sequence, 70% of the amino acids in the candidate sequence are identical to the corresponding amino acid in the reference sequence, or constitute a conserved amino acid change thereto. "Amino acid sequence identity" is understood to require identical amino acids between two aligned sequences. Thus, a candidate sequence sharing 60% amino acid identity with a reference sequence requires that, following alignment of the candidate sequence with the reference sequence, 60% of the amino acids in the candidate sequence are identical to the corresponding amino acid in the reference sequence. As used herein, all homologies and identities calculated use OP-1 as the reference sequence. Also as used herein, sequences are aligned for homology and identity calculations using the method of Needleman et al. (1970) J.Mol. Biol. 4 :443-453 and identities calculated by the Align program (DNAstar, Inc.) In all cases, internal gaps and amino acid insertions in the candidate sequence as aligned are ignored when making the homology/identity calculation. The currently most preferred protein sequences useful as morphogens in this invention include those having greater than 60% identity, preferably greater than 65% identity, with the amino acid sequence defining the conserved six cysteine skeleton of hOPl (e.g., residues 43-139 of Seq. ID No. 5). These most preferred sequences include both allelic and species variants of the OP-1 and OP-2 proteins, including the Drosophila 60A protein. Accordingly, in another preferred aspect of the invention, useful morphogens include active proteins comprising species of polypeptide chains having the generic amino acid sequence herein referred to as "OPX" (Seq. ID No. 29), which defines the seven cysteine skeleton and accommodates the homologies between the various identified species of OP1 and OP2. As described therein, each Xaa at a given position independently is selected from the residues occurring at the corresponding position in the C-terminal sequence of mouse or human OP1 or OP2 (see Seq. ID Nos. 5-8 and/or Seq. ID Nos. 16-23). In still another preferred aspect of the invention, useful morphogens include dimeric proteins comprising amino acid sequences encoded by nucleic acids that hybridize to DNA or RNA sequences encoding the C-terminal sequences defining the conserved seven cysteine domain of OP1 or OP2, e.g., nucleotides 1036-1341 and nucleotides 1390-1695 of Seq. ID No. 16 and 20, respectively, under stringent hybridization conditions. As used herein, stringent hybridization conditions are defined as hybridization in 40% formamide, 5 X SSPE, 5 X Denhardt's Solution, and 0.1% SDS at 37°C overnight, and washing in 0.1 X SSPE, 0.1% SDS at 50°C. The morphogens useful in the methods, compositions and devices of this invention include proteins comprising any of the polypeptide chains described above, whether isolated from naturally-occurring sources, or produced by recombinant DNA or other synthetic techniques, and includes allelic and species variants of these proteins, naturally-occurring or biosynthetic mutants thereof, as well as various truncated and fusion constructs. Deletion or addition mutants also are envisioned to be active, including those which may alter the conserved C-terminal cysteine skeleton, provided that the alteration does not functionally disrupt the relationship of these cysteines in the folded structure. Accordingly, such active forms are considered the equivalent of the specifically described constructs disclosed herein. The proteins may include forms having varying glycosylation patterns, varying N-termini, a family of related proteins having regions of amino acid sequence homology, and active truncated or mutated forms of native or biosynthetic proteins, produced by expression of recombinant DNA in host cells. The morphogenic proteins can be expressed from intact or truncated cDNA or from synthetic DNAs in procaryotic or eucaryotic host cells, and purified, cleaved, refolded, and dimerized to form morphogenically active compositions. Currently preferred host cells include E_^ coli or mammalian cells, such as CHO, COS or BSC cells. A detailed description of the morphogens useful in the methods, compositions and devices of this invention is disclosed in copending US patent application Serial Nos. 752,764, filed August 30, 1991, and 667,724, filed March 11, 1991, the disclosures of which are incorporated herein by reference. Thus, in view of this disclosure, skilled genetic engineers can isolate genes from cDNA or genomic libraries of various different species which encode appropriate amino acid sequences, or construct DNAs from oligonucleotides, and then can express them in various types of host cells, including both procaryotes and eucaryotes, to produce large quantities of active proteins capable of stimulating the morphogenesis of, and/or inhibiting damage to, periodontal tissue. Other features and advantages of the invention will be apparent from the following description of the preferred embodiments, and from the claims. Brief Description of the Drawings The foregoing and other objects and features of this invention, as well as the invention itself, may be more fully understood from the following description, when read together with the accompanying drawings, in which: Fig. 1 is a schematic illustration of a healthy tooth i the tooth socket; and Fig. 2 (A and B) are photomicrographs demonstrating the effect of morphogen (2A) or carrier alone (2B) on periodontal tissue regeneration in a surgically prepared canine tooth socket. Fig.3 (A and B) are photomicrographs demonstrating the effect of morphogen (3A) or carrier alone (3B) on dentine tissue regeneration in a surgically exposed dental pulp experiment. Detailed Description It has been discovered that the morphogens described herein can stimulate periodontal tissue formation, includin regenerating lost or damaged periodontal ligament and/or cementum. The invention may be used for tooth implant integration as well as to inhibit and/or repair periodontal tissue loss due to disease or mechanical injury. The invention is practiced using a morphogen or morphogen- stimulating agent, as defined herein, and according to the procedures described herein. Provided below is a description of tooth anatomy and useful morphogens, including methods for their production and formulation, as well as exemplary, non-limiting examples which (1) demonstrate the suitability of the morphogens described herein in the methods of the invention, and (2) provide assays with which to test candidate morphogens for their efficacy. I. Tooth Anatomy A vertical section of a tooth in the tooth socket is shown schematically in Fig. 1. The crown 6 of the tooth is composed of enamel 8 and dentin 22. The pulp chamber 12 is seen in the interior of the crown 6 and the center of the root 10; it extends downward into the bony area 14, 16, 18 and opens by a minute orifice, the apical foramen 20, at the extremity of the root 10. The pulp chamber 12 contains dental pulp, a loose connective tissue richly supplied with vessels and nerves, which enter the cavity through the apical foramen 20. Some of the cells of the pulp, i.e., odontoblasts, the precursors of dentin 22, are arranged as a layer on the wall of the pulp chamber 12. During development of the tooth, odontoblasts are columnar, but later, after the dentin 22 is fully formed, they become flattened and resemble osteoblasts. The solid portion of the mature tooth includes dentin 22, enamel 8, and a thin layer of cementum 24, which is disposed on the surface of the root 25. Enamel 8 is formed during development of the tooth from amyloblasts, and cementum 24 is formed from cementoblasts. In a fully developed tooth, the principal mass of the tooth comprises dentin 22, which is made up of hydroxyapatite crystals embedded in a strong meshwork of collagen fibers. The dentin includes a number of minute wavy and branching tubes called dental canaliculi, embedded in a dense homogeneous substance, the matrix. The dental canaliculi are parallel with one another and open at their inner ends into the pulp chamber 12. The dentin matrix is translucent and comprises the majority of the inorganic mass of the dentin. It includes a number of fine fibrils, which are continuous with the fibrils of the dental pulp. After the organic matter has been removed by steeping a tooth in weak acid, the remaining organic matter may be torn into laminae that run parallel with the pulp chamber 12 across the direction of the tubes. The cementum 24 is disposed as a thin mineralized layer covering the tooth root. It extends from where the enamel terminates to the apex of each root, where it is usually very thick. Cementum resembles bone in structure and chemical composition in that it contains, sparingly, the lacunae and canaliculi that characterize true bone; in the thicker portions of the cementum, the lamellae and Haversian canals peculiar to bone are also found. As a result of aging, the cementum increases in thickness and the pulp chamber also becomes partially filled with a hard substance that is intermediate in structure between dentin and bone. It appears to be formed by a slow conversion of the dental pulp, which shrinks or even disappears. The periodontal ligament, or periodontal membrane 26, i the layer of periodontal tissue which forms a cushion between the cementum 24 and the bone 14, 16, 18; it holds the tooth in position by suspending it in the socket (alveolus) of the jawbone. The periodontal ligament is a highly organized tissue which is formed from periodontal fibroblasts. It organizes the collagen fibers which pass directly from the bone of the jaw into the cementum. II. Useful Morphogens As defined herein a protein is morphogenic if it is capable of inducing the developmental cascade of cellular and molecular events that culminate in the formation of new, organ-specific tissue and comprises at least the conserved C-terminal six cysteine skeleton or its functional equivalent (see supra). Specifically, the morphogens generally are capable of all of the following biological functions in a morphogenically permissive environment: stimulating proliferation of progenitor cells; stimulating the differentiation of progenitor cells; stimulating the proliferation of differentiated cells; and supporting the growth and maintenance of differentiated cells. Details of how the morphogens useful in the method of this invention first were identified, as well as a description on how to make, use and test them for morphogenic activity are disclosed in international application (US92/01968 (W092/15323), the disclosure of which is incorporated hereinabove by reference. As disclosed therein, the morphogens may be purified from naturally-sourced material or recombinantly produced from procaryotic or eucaryotic host cells, using the genetic sequences disclosed therein. Alternatively, novel morphogenic sequences may be identified following the procedures disclosed therein. Particularly useful proteins include those which comprise the naturally derived sequences disclosed in Table II. Other useful sequences include biosynthetic constructs such as those disclosed in U.S. Pat. 5,011,691, the disclosure of which is incorporated herein by reference (e.g., COP-1, COP-3, COP-4, COP-5, COP-7, and COP-16). Accordingly, the morphogens useful in the methods and compositions of this invention also may be described by morphogenically active proteins having amino acid sequences sharing 70% or, preferably, 80% homology (similarity) with any of the sequences described above, where "homology" is as defined herein above. The morphogens useful in the method of this invention also can be described by any of the 6 generic sequences described herein (Generic Sequences 1, 2, 3, 4, 5 and 6). Generic sequences 1 and 2 also may include, at their N- terminus, the sequence Cys Xaa Xaa Xaa Xaa (Seq. ID No. 15) 1 5 Table II, set forth below, compares the amino acid sequences of the active regions of native proteins that have been identified as morphogens, including human OP-1 (hOP-1, Seq. ID Nos. 5 and 16-17), mouse OP-1 (mOP-1, Seq. ID Nos. 6 and 18-19), human and mouse OP-2 (Seq. ID Nos. 7, 8, and 20- 23), CBMP2A (Seq. ID No. 9), CBMP2B (Seq. ID No. 10), BMP3 (Seq. ID No. 26), DPP (from Drosophila, Seq. ID No. 11), Vgl, (from Xenopus, Seq. ID No. 12), Vgr-1 (from mouse, Seq. ID No. 13), GDF-1 (from mouse, Seq. ID Nos. 14, 32 and 33), 60A protein (from Drosophila, Seq. ID Nos. 24 and 25), BMP5 (Seq. ID No. 27) and BMP6 (Seq. ID No. 28). The sequences are aligned essentially following the method of Needleman et al. (1970) J. Mol. Biol., £8:443-453, calculated using the Align Program (DNAstar, Inc.) In the table, three dots indicates that the amino acid in that position is the same as the amino acid in hOP-1. Three dashes indicates that no amino acid is present in that position, and are included for purposes of illustrating homologies. For example, amino acid residue 60 of CBMP-2A and CBMP-2B is "missing". Of course, both these amino acid sequences in this region comprise Asn-Ser (residues 58, 59), with CBMP-2A then comprising Lys and He, whereas CBMP-2B comprises Ser and He. TABLE II hOP-l Cys Lys Lys His Glu Leu Tyr Val mOP-1 hOP-2 mOP-2 DPP Vgl Vgr-1 CBMP-2A CBMP-2B BMP3 Lys GDF-1 60A BMP5 BMP6 Arg hOP-l Ser Phe Arg Asp Leu Gly Trp Gin Asp mOP-l h0P-2 Gin m0P-2 Ser • • • DPP Asp Ser Val Vgl Glu Lys Val Vgr-1 • • • Gin Val CBMP-2A Asp Ser Val CBMP-2B Asp Ser Val BMP3 Asp Ala He GDF-1 Glu Val 60A Asp Lys BMP5 BMP6 Gin 10 15 He Ala Pro Glu Gly Tyr Ala Val Val Val Ser Lys 20 25 Tyr Cys Glu Gly Glu Cys Ala Ser • • * His Lys Pro Tyr Pro Asp Ser His Glu Pro His Asp Pro Ser Ala Gin Gin Gin Ser Asn Asp Ser Asp Ser 30 35 hOP-l Phe Pro Leu Asn Ser Tyr Met Asn Ala mOP-l hOP-2 m0P-2 DPP Vgl Tyr Vgr-1 CBMP-2A CBMP-2B GDF-1 Leu BMP3 60A BMP5 BMP6 He 45 50 hOP-l mOP-l h0P-2 m0P-2 DPP Vgl Vgr-1 CBMP-2A CBMP-2B BMP3 GDF-1 Met 60A BMP5 BMP6 hOP-l Pro Lys Pro Cys Cys Ala Pro Thr Gin mOP-l hOP-2 Ala m0P-2 Ala DPP Ala Vgl Leu Vgr-1 CBMP-2A Ala CBMP-2B Ala BMP3 Glu GDF-1 Asp Leu 60A BMP5 BMP6 65 70 hOP-l Leu Asn Ala He Ser Val Leu Tyr Phe mOP-l h0P-2 • • • ύcT • • • Thr m0P-2 • • • DcT • • • Thr Vgl Met Ser Pro Met Vgr-1 Val DPP Asp Ser Val Ala Met CBMP-2A • • • uCi • • • Met CBMP-2B • • • Cl • • • Met BMP3 Met Ser Ser Leu He GDF-1 Ser Pro 60A Gly Leu Pro His BMP5 BMP6 75 80 hOP-l Asp Asp Ser Ser Asn Val He Leu Lys mOP-l h0P-2 Ser Asn mOP-2 Ser Asn DPP Asn • • » Gin • • • Thr Val Vgl Asn Asn Asp Val Vgr-1 Asn • • • CBMP-2A Glu Asn Glu Lys Val CBMP-2B Glu Tyr Asp Lys Val BMP3 Glu Asn Lys Val GDF-1 Asn Asp Val 60A Leu Asn Asp Glu Asn BMP5 BMP6 Asn 85 90 95 Cys Gly Cys His Arg Arg Arg Arg Ala Arg Arg 100 **Between residues 56 and 57 of BMP3 is a Val residue; between residues 43 and 44 of GDF-1 lies the amino acid sequence Gly-Gly-Pro-Pro. As is apparent from the foregoing amino acid sequence comparisons, significant amino acid changes can be made within the generic sequences while retaining the morphogenic activity. For example, while the GDF-1 protein sequence depicted in Table II shares only about 50% amino acid identity with the hOPl sequence described therein, the GDF-1 sequence shares greater than 70% amino acid sequence homology (or "similarity") with the hOPl sequence, where "homology" or "similarity" includes allowed conservative amino acid changes within the sequence as defined by Dayoff, et al. , Atlas of Protein Sequence and Structure vol.5, supp.3, pp.345-362, (M.O. Dayoff, ed., Nat'l BioMed. Res. Fd'n, Washington D.C. 1979.) The currently most preferred protein sequences useful as morphogens in this invention include those having greater than 60% identity, preferably greater than 65% identity, with the amino acid sequence defining the conserved six cysteine skeleton of hOPl (e.g., residues 43-139 of Seq. ID No. 5). These most preferred sequences include both allelic and species variants of the OP-1 and OP-2 proteins, including the Drosophila 60A protein. Accordingly, in still another preferred aspect, the invention includes morphogens comprising species of polypeptide chains having the generic amino acid sequence referred to herein as "OPX", which defines the seven cysteine skeleton and accommodates the identities between the various identified mouse and human OP1 and OP2 proteins. OPX is presented in Seq. ID No. 29. As described therein, each Xaa at a given position independently is selected from the residues occurring at the corresponding position in the C-terminal sequence of mouse or human OPl or OP2 (see Seq. ID Nos. 5-8 and/or Seq. ID Nos. 16-23). Alternatively, an effective amount of an agent capable of stimulating endogenous morphogen levels may be administered by any of the routes described herein below. For example, an agent capable of stimulating morphogen production and/or secretion from periodontal tissue cells, alveolar bone tissue cells in the fresh tooth socket, or dentin tissue, may be provided to a mammal, e.g., by direct administration of the morphogen-stimulating agent to the tooth root and/or tooth socket bone surface. Alternatively, the morphogen-stimulating agent may induce morphogen expression and/or secretion at a distant site (e.g., at a tissue locus other than periodontal, dental or alveolar bone tissue), with the expressed morphogen targeting itself to periodontal tissue. A method for identifying and testing agents capable of modulating the levels of endogenous morphogens in a given tissue is described generally herein in Example 3, and in detail in copending USSN [Atty Docket CRP-058CP], filed August 28, 1992 and USSN 752,859, filed August 30, 1991, the disclosures of which are incorporated herein by reference. Briefly, candidate compounds can be identified and tested by incubating the compound J I vitro with a test tissue or cells thereof, for a time sufficient to allow the compound to affect the production, i.e., the expression and/or secretion, of a morphogen produced by the cells of that tissue. Here, suitable tissue, or cultured cells of a tissue, preferably comprise periodontal fibroblasts, cementoblasts, odontoblasts or osteoblasts. III. Formulations and Methods for Administration 1. Therapeutic Agent Considerations The morphogens may be provided to the tooth root and/or tooth socket surface by any suitable means. Preferably, th morphogen, or a morphogen-stimulating agent, (collectively, the therapeutic agent) is provided directly to the tissue surface by topical administration. Alternatively, the therapeutic agent may be provided to the tissue by, for example, local injection. While not currently preferred, systemic injection also may be a viable administration route for certain applications, such as periodontal tissue maintenance in older adults, immuno-suppressed individuals, or others at chronic risk for periodontal tissue loss. A detailed description of considerations for systemic administration, including oral and parenteral administration, is disclosed, for example, in international application US92/07358 (WO93/04692), incorporated hereinabove by reference. Where the therapeutic agent is provided directly to the tooth socket, the therapeutic agent may be provided to the socket surface as part of a biocompatible formulation that may be a liquid, gel or solid. The therapeutic agent further may be dispersed in and associated with a carrier capable of maintaining the morphogen at the administered locus. Useful formulations include viscous compositions. Biocompatible compositions that increase the viscosity of the formulation include glycerol, polyalkylene glycols such as polyethylene glycol, oils of vegetable origin, hydrogenated naphthalenes, and the like. The formulation also may include an ij vivo bioresorbable carrier material that acts as a controlled release delivery vehicle. Useful carriers may include biocompatible, preferably biodegradable structural components from, e.g., an extracellular matrix, such as collagen, laminin, hyaluronic acid, and the like, or polymeric materials, such as polylactic, polybutyric and polyglycolic acids. The carrier also may comprise an acellular tissue matrix, substantially depleted in nonstructural components, such as a demineralized, guanidine-extracted dentin, periodontal ligament or cementum matrix. Details for preparing such matrices are disclosed in international application US92/01968 (W093/15323) . Other useful controlled release carriers in which the therapeutic agent may be dispersed are described in U.S. Pat. Nos. 4,975,526 and 4,919,939, the disclosures of which are incorporated herein by reference. Where the morphogen is to be provided to a tooth root surface, it may be formulated in a composition for controlled delivery as described above and applied topically to the tooth root surface as described below. Alternatively, or in addition, the therapeutic agent may be dispersed in a liquid formulation into which at least the tooth root surface is placed and the liquid lyophilized to adsorb the therapeutic agent onto the tooth surface. Where the agent is administered to inhibit periodontal tissue loss and/or to regenerate periodontal tissue surrounding an implanted tooth, the agent may be provided to the area between the tooth and gum (gingiva) by injection or by topical application. Where the morphogen is to be provided directly (e.g., locally, as by injection, e.g., to a periodontal or alveolar tissue site), the morphogen preferably comprises part of an aqueous solution which also may contain a carrier material. The solution is physiologically acceptable so that in addition to delivery of the desired morphogen to the patient, the solution does not otherwise adversely affect the patient's electrolyte and volume balance. The aqueous medium for the morphogen thus may comprise normal physiologic saline (0.85% NaCl, 0.15M), pH 7-7.4. The aqueous solution containing the morphogen can be made, for example, by dissolving the protein in 50% ethanol containing acetonitrile in 0.1% trifluoroacetic acid (TFA) or 0.1% HCl, or equivalent solvents. One volume of the resultant solution then is added, for example, to ten volumes of phosphate buffered saline (PBS), which further may include 0.1-0.2% human serum albumin (HSA). The resultant solution preferably is vortexed extensively. If desired, a given morphogen may be made more soluble in the solution by association with a suitable molecule. For example, the pro form of the morphogenic protein comprises a species that is soluble in physiological solutions. In fact, the endogenous protein is thought to be transported (e.g., secreted and circulated) in this form. This soluble form of the protein may be obtained from the culture medium of morphogen-secreting mammalian cells. Alternatively, a soluble species may be formulated by complexing the mature dimer (or an active fragment thereof) with part or all of pro domain. Other components, including various serum proteins, also may be useful. A more detailed description for formulating soluble morphogen complexes appears in Example 4, below. Finally, the morphogens or morphogen-stimulating agent provided herein may be administered alone or in combinatio with other molecules, particularly symptom alleviating cofactors. Useful pharmaceutical cofactors include antiseptics, antibiotics, anaesthetics and analgesics. Preferred antiseptics for use in the present system includ chlorhexidine and tibezonium iodide; preferred antibiotics include tetracycline, aminoglycosides such as neomycin, gentamycin, kanamycin, tobramycin, netilmicin, sisomicin, amicamycin, their sulfates or other derivatives, macrolide such as erythromycin, its salts and other derivatives, spiramycin, josamicin or miocamicin, penicillins such as ampicillin, amoxicillin and the like, and cephalosporins, for example, cefaclor, cefadroxil, cefazolin, cefoperazone cefotaxime, cephalothin, cefalexin, ceforanide, cefonicide or ceftriaxone. Preferred anaesthetics/analgesics include amide-type local anaesthetics such as lidocaine, mepivacaine, pyrrocaine, bupivacaine, prilocaine, etidocaine, or other widely used anaesthetics such as procaine. Other cofactors include non-steroidal anti-inflammator agents. However, the morphogens described herein themselv modulate the body's inflammatory/immune response to an initial tissue injury. Specifically, and as described in detail in international application US92/07358 (WO93/04692) in the presence of a morphogen, progenitor inflammatory effector cells induced to migrate to a site of tissue inju do not become significantly activated. Without being limited to any given theory, it is thought that, in the presence of the morphogen, damaged tissue is induced to undergo a recapitulation of tissue morphogenesis, where progenitor cells are induced to proliferate and differentiate in a tissue-specific manner, and new, functional, organized tissue is formed to replace the damaged or lost tissue, rather than disorganized, fibrous scar tissue. The formulated compositions contain therapeutically effective amounts of the morphogen, e.g., amounts which provide appropriate concentrations of the morphogen to the tooth surface for a time sufficient to stimulate growth an development of periodontal tissues, including morphogenesis of periodontal ligament and/or cementum, and/or to substantially inhibit periodontal tissue loss. As will be appreciated by those skilled in the art, the concentration of the compounds described in a therapeutic composition will vary depending upon a number of factors, including the biological efficacy of the selected morphogen the chemical characteristics (e.g., hydrophobicity) of the compounds employed, the formulation of the compound excipients, the administration route, and the treatment envisioned. The preferred dosage to be administered also i likely to depend on such variables such as the condition of the tissues within the tooth socket, the size of the tooth or tooth socket, the length of time after tooth loss, exten of periodontal tissue loss and the overall health status of the particular patient. The amount of morphogen applied also will depend on the tooth size. In general, 0.1-1000 μ of morphogen are sufficient with 1-100 μg being preferable. For example, for a large tooth, e.g., an incisor or large molar, about 10-100 μg, and preferably 50 μg of morphogen, may be used to advantage; a medium tooth may be treated wi approximately 5-50 μg , and preferably 25 μg; and a small tooth, with approximately 1-25, preferably 5-10 μg morphogen. No obvious morphogen induced pathological lesions are induced when mature morphogen (e.g., OP-1, 20 μg) is administered daily to normal growing rats for 21 consecutive days. Moreover, 10 μg systemic injections morphogen (e.g., OP-1) injected daily for 10 days into normal newborn mice does not produce any gross abnormalities. 2. Tooth Preparation Tooth loss may be repaired by implanting a viable toot having a healthy root and pulp system or by implanting a tooth prosthesis. The prosthesis may be a tooth from which the root has been removed and replaced with a biocompatible biologically inert material, e.g., as typically is replaced in a root canal procedure, or may be a completely synthetic prosthesis coated, for example, with a porous material to enhance tooth integration in the tooth socket. Useful prosthesis coating materials include collagen fibers, ceramics and metals, such as titanium oxide. The root of the implanted tooth first may be partially demineralized as described below. Alternatively, a clean, mineralized natural tooth or dentin-containing prosthetic tooth may be implanted. A tooth to be implanted first is obtained, e.g., by los or removal of a natural tooth from the tooth socket, e.g., using standard tooth extraction means well known to one skilled in the dentistry art. Alternatively, an allogenic tooth may be obtained from a tooth bank. The natural, mineralized tooth or tooth root may be coated as is with a morphogen and implanted as described below. Alternatively, the mineralized, natural tooth root surface first may be scored or scraped to expose dentin tissue beneath the enamel. Natural, mineralized teeth also may be treated briefly with an acidic solution (e.g., sodium citrate, abou pH 3.5) to remove a thin external layer, e.g., about 1-5 cells in thickness from at least the root surface. Preferred treatment times are from about 0.5 to 5 minutes. The treated teeth preferably then are washed, dried and coated with morphogen as described below. Alternatively, the tooth root portion may be at least partially demineralized according to any conventional procedure prior to implantation. A currently preferred demineralization method is to soak the tooth in a demineralizing solution fo a length of time sufficient to remove at least some mineral components from the tooth. For example, at least the root portion of the tooth may be placed in a volume, e.g., 0.025 1 liter of a demineralizing agent such as hydrochloric acid (HCl) at a cool temperature for a time sufficient to achiev partial demineralization, e.g., 0.5-0.6 M HCl at 4°C for a prescribed number of minutes (e.g., preferably within the range of about 10-200 minutes.) Essentially complete demineralization may be achieved by acid exposure for 1-7 days. If desired, several changes of the demineralizing agent may be performed. The partially demineralized tooth will be of the same shape as prior to demineralization, but will weigh less due to the absence of the mineral content. The tooth then may be dried by lyophilization. The tooth or tooth prosthesis may be treated with morphogenic protein as follows. The morphogen may be applied to the tooth or tooth prosthesis root surface by any means known in the art for adsorbing a protein to a surface. A currently preferred method is to suspend the morphogen in a small volume sufficient to cover the tooth surface, e.g.. 200-300μl, freeze the tooth in solution, and then lyophiliz the frozen liquid. A currently preferred solution is ethanol (e.g. 50%) or acetonitrile/trifluroactic acid (TFA) other solutions include HCL/TFA, buffered saline, and the like. Alternatively, or in addition, the therapeutic agent may be provided to the tooth root surface dispersed in a suitable carrier material as described above. Similarly, and as described above, the therapeutic agent may be provided to the tooth socket surface and the tooth to be implanted embedded in the morphogen composition on the socket surface. Also as described above, the morphogen may be provided to the tooth root surface in admixture with one or more cofactors. The tooth then is implanted into a fresh or surgically prepared tooth socket. A surgically prepared surface is prepared by extracting the tooth and removing any scar or other undesired fibrous tissue built up in the socket by standard mechanical and/or chemical procedures well known o the surgical and dental arts. The tooth then is implanted in the site using standard dental and surgical procedures. The implanted tooth is allowed to grow in the prepared socket for a time sufficient to allow the periodontium to regenerate, e.g., one to several months. The integrity and health of the integrated tooth then may be assessed by a dentist by radiography and visual examination. For experimental purposes, the integration of an implanted tooth following morphogen treatment can be assessed for integrity and health by removing the entire mandibular area, including the tooth socket and tooth, and examining cross sections of the mandibular area. 5-10 μm cross sections may be prepared for histological evaluation by standard histology procedures, e.g., fixing tissue with formalin, preparing sections for slides and staining with eosin and hematoxylin. The growth and integrity of hard tissues, such as bone, cementum and dentin, also can evaluated radiographically. Finally, as described in Example 2 below, the morphogen of this invention also induce dentin tissue morphogenesis when provided to an area of lost or damaged dentin. Accordingly, using the procedures described herein and in international application (US92/01968 (W092/15323) , the morphogen described herein also may be used to repair and regenerate damaged and/or lost dentin tissue in an implante tooth. IV. Examples Example 1. Experimental Regeneration of Peridontium in a Do Model The following experiment demonstrates successful integration of an implanted demineralized, protein-extracte morphogen-treated tooth in a mammal. Premolar teeth were extracted from a dog and divided into three experimental groups: (a) demineralized teeth; (b) demineralized and guanidine extracted teeth; and (c) demineralized, guanidine extracted, and morphogen-treated teeth. Teeth from each group were tested in "fresh" sockets, e.g., tooth sockets from which the teeth had just been removed, as well as surgically prepared sockets, e.g., sockets from which teeth had been extracted 2 months previously and in which scar tissue had formed. These "healed" sockets were surgically prepared for tooth implantation by removing (e.g., by scraping) scar tissue build up to reveal fresh alveolar bone. The teeth from all three groups were completely demineralized by placing them in 4 liters of 0.5 M HCl at 4°C for 5 days. The 0.5 M HCl solution was changed every hours during the 5 day period. The teeth then were washed in 4 liters of deionized water at 4°C for 5 days. The wat solution was also changed every 24 hours during the 5 day period. Teeth from group (a) then were lyophilized until dry and set aside and maintained at 4°C until ready for us Teeth from groups (b) and (c) then were protein-extracted by multiple extractions in 6 M quanidine Hcl, followed by washes with distilled water. Specifically the teeth were placed in in 2-4 liters of 6 M guanidine- HCl/Tris HCl pH 7.0 at 4°C for 72 hours; then washed and further extracted in 200 ml of the guanidine-HCl solution for 4 hours. The teeth were washed again with 4 liters of distilled dH 2 0 at 4°C for 48 hours, and 4 liters of dH 2 0 fo an additional 12 hours with 3 changes of dH 2 0. The teeth were then lyophilized until dry. Teeth from group (b) were then set aside and maintained at 4°C until ready for use. Teeth from group (c) then were treated with the morphogen OP-1 as follows. 1.15 mg of OP-1 was resuspended in 4 ml of 47.5% ethanol/0.09% trifluoroacetic acid (TFA). The concentration was determined to be 0.273 mg/ml. Approximately 50 μg of OP-1 (183 μl of the OP-1 solution) was dispensed into an eppendorf tube, and the total volume brought to 300 μl of 47.5% ethanol/0.09% TFA. Each tooth then was placed in an eppendorf tube such that the OP-1 solution just covered the tooth. The tube was placed at " 70°C until the OP-1 solution was frozen, and lyophilized until dry. During lyophilization, care was taken to keep the tube cold. Approximately 50-70% of the OP-1 can be expected to remain in or on the tooth after lyophilization. The teeth from each of groups (a), (b), and (c) were then implanted into a freshly prepared tooth socket or surgically prepared socket using standard dental surgery procedures known in the art. The implanted teeth in all three groups were allowed to remain in the socket for two months. The dog then was sacrificed, the mandible cross-sectioned and x-rayed, and histology performed. The results are described below and follows. Ankylosis formed in the group (a) implants, where demineralized tooth matrix was implanted alone. Cross- sections of the group (a) mandible revealed that the demineralized tooth was surrounded by bone directly attaching to the root or dentin surface. In addition, ther was little new tissue growth between the tooth and the bone Representative histology is illustrated in the photomicrograph of Fig. 2A where bone tissue 14 grows directly into dental tissue 22 in the implanted tooth. In the group (b) implants, cross-sections revealed formation of unorganized fibrous tissue around the implante demineralized, guanidine extracted tooth. The periodontal ligament was loose and disorganized, as was the surrounding bony tissue. Examination of the tooth root surface where cementum matrix normally appears revealed resorption of cementum in the upper coronal surface of the tooth. Histological sections also revealed inflammation as evidenced by the presence of macrophages. As is evident in Fig. 2b, group (c) implant cross- sections revealed formation of newly formed, organized cementum 24 and periodontal ligament tissue 26 around the morphogen-treated tooth matrix, and growth of new bone connecting the newly formed periodontium to the mandible. The tooth was firmly anchored in the tooth socket. The tissues surrounding the tooth, i.e., the newly-formed cementum growing perpendicular to the newly-formed periodontal ligament, and the alveolar bony tissue, all wer healthy and organized much as the tooth and tooth socket shown schematically in Fig. 1. The newly-formed cementum comprised immature columnar cell layers which were beginnin to flatten into mature cementoblasts, and the newly-formed periodontal ligament comprised a thick layer of tissue to anchor and cushion the tooth within the tooth socket. The results of this experiment demonstrate that morphogens promote tooth integration into a tooth socket, and induce morphogenesis of periodontium, including morphogenesis of the regeneration and formation of the periodontium, new cementum and periodontal ligament. Without being limited to any particular theory, the morphogens may act in the tooth socket environment by inducing a differentiation of primary fibroblasts on the alveolar surface to differentiate into cementoblasts which then induct other primary fibroblasts to form periodontal ligament. Example 2. Morphogen-Induced Dentinoqenesis The examples presented below demonstrate the efficacy o morphogens in inducing dentin tissue morphogenesis in an animal model. Further details of the first experiment and the implications of this biological activity of morphogens are disclosed in international application (US92/01968 (W092/15323). To date, the unpredictable response of dental pulp tissue to injury is a basic clinical problem in dentistry. Cynomolgus monkeys were chosen as primate models for the reparative dentine/pulp capping examples described below. Using standard dental surgical procedures, small areas (e.g., 2mm) of dental pulps were surgically exposed by removing the enamel and dentin immediately above the pulp (by drilling) of sample teeth, performing a partial amputation of the coronal pulp tissue, inducing hemostasis, application of the pulp treatment, and sealing and filling the cavity by standard procedures. Pulp treatments used were: OPl dispersed in a carrier matrix; carrier matrix alone and no treatment. Twelve teet per animal (four for each treatment) were prepared, and two animals were used. At four weeks, teeth were extracted and processed histologically for analysis of dentin formation, and/or ground to analyze dentin mineralization. Morphogen treatment produced dramatic effects: Control treatments with carrier alone or with no treatment (PBS) showed little or no reparation of the lost tissue. By contrast, morphogen-treated teeth showed significant dentin tissue formation in the area where dentin tissue had been surgically removed. The experimental results show that morphogen treatment reliably induced formation of reparativ or osteodentin bridges on surgically exposed healthy dental pulps. See, for example. Fig. 3A, where OPl dispersed in a carrier (demineralized, guanidine-extracted bone collagen matrix prepared as described in U.S. Patent No. 4,975,526) constituted the pulp treatment. As is evident from the micrograph new dentine formation effectively bridges or "caps" the surgically exposed dental pulp, maintaining the integrity and viability of the pulp tissue. By contrast, pulps treated with carrier matrix alone, or not treated. failed to form reparative dentin. See, for example Fig. 3 where carrier alone (demineralized, guanidine-extracted bo collagen matrix prepared as described in U.S. Patent No. 4,975,526) constituted the pulp treatment. As is evident from the micrograph, minimal reparative dentin formed, insufficient to bridge the exposed pulp tissue. Without further treatment such exposed, unprotected pulp tissue wi become infected and die. In a supplemental experiment, a range of morphogen concentrations were tested. In all cases, human OP-1, prepared as described in Sampath et al. (1992) J. Biol. Chem. 267: 20352-20362, was the morphogen tested, and bone collagen matrix, prepared as described in U.S. Patent No. 4,975,526 was the carrier material/delivery vehicle ("CM"). Briefly, cortical bone powder was prepare from freshly obtained bovine femurs. The epiphyses, adherent flesh and marrow were removed and residual lipids extracted with hexane, isopropanol, and ethyl ether. The resulting material was ground and sieved to a described particle size of 75-425 μm. The cortical bone powder then was demineralized in acid, and soluble proteins extracted with guanidine hydrochloride. The demineralized, extracte bone powder then was subjected to a thermal acid treatment, washed with water, and lyophilized. The final dry powder was sieved to remove particles >425 μm and stored at 4°C. The hOP-l/CM samples were prepared by combining hOP-l with the CM and drying under vacuum. The batch used in these experiments contained 2.5μg hOP-l/mg CM. Prior to implant the sample was moistened with a sterile aqueous solution, preferably saline, to form a paste-like substance CM controls were prepared using the same procedure, omittin the morphogen. The samples were stored at -20°C until used The pulp capping experiments were conducted using 4 adult female non-human primates (Macaca fasicularis) of approximately 4 kg each. The animals were sedated using standard procedures, e.g., with ketamine (15 mg/kg body wt. and acepromazine (0.55 mg/kg body wt. ) supplemented with local intraoral infiltration anesthesia. Thirty premolar and molar teeth in four animals were isolated by rubber dam and the pulps exposed using standar dentistry procedures, e.g., using sterile high speed rotary cutting instruments with water spray coolant. The pulp exposures made were approximately 1-1.5 by 2-2.5 mm. Partial hemostasis was achieved with sterile cotton pellets but the teeth were not dried extensively prior to treatment The exposed pulps were treated with: hOP-l/CM (2.5 μg hOP-l/mg CM) at 1.5, 3.0 or 6.0 mg/tooth; or one of three controls: Ca(OH) 2 paste, a standard pulp capping agent use in the art ("Dycal", L.D. Caulk, Milford, DE); CM alone, 3.0 mg/tooth; or no treatment material. The teeth then wer sealed with a standard adhesive, e.g., Temp-Bond NE™ (Kerr U.S.A., Romulus, MI). The teeth were allowed to heal for six weeks. No changes in behavior were noted by any of the animals during the healing period. The animals were sacrificed six weeks following surgery and prepared for histomorphometric analysis using standard procedures. For example, teeth were fixed by immersion in 10% formalin in phosphate buffered saline (pH 7 2) and decalcified in formic acid/sodium citrate at room temperature for 6-8 days. The specimens were processed, imbedded in paraffin, serial sectioned (5 μm) and stained. In all teeth treated with hOP-l/CM and for all OPl concentrations tested, reparative dentine sufficient to bridge the surgically created gap that exposed the underlying pulp tissue was formed. As in the previous experiment, the morphogen/CM device was resorbed in the healed teeth, and replaced with reparative dentine, fully integrated with the cut dentine at the exposure site. Also as in the previous experiment, the pulp tissue beneath the cap appeared normal, with intact odontoblasts lining the pulp chamber. The amount of new dentine tissue increased a the amount of OP-1 provided in a sample was increased, indicating that the amount of reparative dentine formed was related to the mass of OP1/CM administered. Pulp treatment using CM alone or no treatment did not succeed in bridging the exposure site and in several cases resulted in necrotic pulp tissue. Treatments using Ca(OH) 2 succeeded in bridgin the gap, but the paste remained and the bridge created lies within the pulp chamber itself. Example 3. Screening Assay for Candidate Compounds which Alter Endogenous Morphogen Levels Candidate compound(s) which may be administered to affect the level of a given morphogen may be found using th following screening assay, in which the level of morphogen production by a cell type which produces measurable levels of the morphogen is determined with and without incubating the cell in culture with the compound, in order to assess the effects of the compound on the cell. This can be accomplished by detection of the morphogen either at the protein or RNA level. A more detailed description also may be found in international application US92/07359 (WO93/05172) , incorporated hereinabove by reference. 3.1 Growth of Cells in Culture Cell cultures of kidney, adrenals, urinary bladder, brain, or other organs, may be prepared as described widely in the literature. For example, kidneys may be explanted from neonatal or new born or young or adult rodents (mouse or rat) and used in organ culture as whole or sliced (1-4 mm) tissues. Primary tissue cultures and established cell lines, also derived from kidney, adrenals, urinary, bladder, brain, mammary, or other tissues may be established in multiwell plates (6 well or 24 well) according to conventional cell culture techniques, and are cultured in the absence or presence of serum for a period of time (1-7 days). Cells may be cultured, for example, in Dulbecco's Modified Eagle medium (Gibco, Long Island, NY) containing serum (e.g., fetal calf serum at 1%-10%, Gibco) or in serum-deprived medium, as desired, or in defined medium (e.g., containing insulin, transferrin, glucose, albumin, o other growth factors). Samples for testing the level of morphogen production includes culture supernatants or cell lysates, collected periodically and evaluated for OP-1 production by immunoblot analysis (Sambrook et al., eds., 1989, Molecular Cloning, Cold Spring Harbor Press, Cold Spring Harbor, NY), or a portion of the cell culture itself, collected periodically and used to prepare polyA+ RNA for RNA analysis. To monitor de novo OP-1 synthesis, some cultures are labeled according to conventional procedures with an 35 S-methionine/ 35 S-cysteine mixture for 6-24 hours and then evaluated for OP-1 synthesis by conventional immunoprecipitation methods. 3.2 Determination of Level of Morphogenic Protein In order to quantitate the production of a morphogenic protein by a cell type, an immunoassay may be performed to detect the morphogen using a polyclonal or monoclonal antibody specific for that protein. For example, OP-1 may be detected using a polyclonal antibody specific for OP-1 i an ELISA, as follows. 1 μg/100 μl of affinity-purified polyclonal rabbit IgG specific for OP-1 is added to each well of a 96-well plate and incubated at 37°C for an hour. The wells are washed four times with 0.167M sodium borate buffer with 0.15 M NaC (BSB), pH 8.2, containing 0.1% Tween 20. To minimize non-specific binding, the wells are blocked by filling completely with 1% bovine serum albumin (BSA) in BSB and incubating for 1 hour at 37°C. The wells are then washed four times with BSB containing 0.1% Tween 20. A 100 μl aliquot of an appropriate dilution of each of the test samples of cell culture supernatant is added to each well i triplicate and incubated at 37°C for 30 min. After incubation, 100 μl biotinylated rabbit anti-OP-1 serum (stock solution is about 1 mg/ml and diluted 1:400 in BSB containing 1% BSA before use) is added to each well and incubated at 37°C for 30 min. The wells are then washed four times with BSB containing 0.1% Tween 20. 100 μl strepavidin-alkaline (Southern Biotechnology Associates, Inc. Birmingham, Alabama, diluted 1:2000 in BSB containing 0.1% Tween 20 before use) is added to each well and incubated at 37°C for 30 min. The plates are washed four times with 0.5M Tris buffered Saline (TBS), pH 7.2. 50μl substrate (ELISA Amplification System Kit, Life Technologies, Inc., Bethesda, MD) is added to each well incubated at room temperature for 15 min. Then, 50 μl amplifier (from the same amplification system kit) is added and incubated for another 15 min at room temperature. The reaction is stopped by the addition of 50 μl 0.3 M sulphuri acid. The OD at 490 nm of the solution in each well is recorded. To quantitate OP-1 in culture media, a OP-1 standard curve is performed in parallel with the test samples. Polyclonal antibody may be prepared as follows. Each rabbit is given a primary immunization of 100 ug/500 μl E. coli produced OP-1 monomer (amino acids 328-431 in SEQ ID NO:5) in 0.1% SDS mixed with 500 μl Complete Freund's Adjuvant. The antigen is injected subcutaneously at multiple sites on the back and flanks of the animal. The rabbit is boosted after a month in the same manner using incomplete Freund's Adjuvant. Test bleeds are taken from the ear vein seven days later. Additional boosts and test bleeds are performed at monthly intervals until antibody against OP-1 is detected in the serum using an ELISA assay. Then, the rabbit is boosted with 100 μg of antigen and bled (15 ml per bleed) at days seven and ten after boosting. Monoclonal antibody specific for a given morphogen may be prepared as follows. A mouse is given two injections of E. coli produced OP-1 monomer. The first injection contain lOOμg of OP-1 in complete Freund's adjuvant and is given subcutaneously. The second injection contains 50 μg of OP- in incomplete adjuvant and is given mtraperitoneally. The mouse then receives a total of 230 μg of OP-1 (amino acids 307-431 in SEQ ID NO:5) in four intraperitoneal injections at various times over an eight month period. One week prio to fusion, the mouse is boosted mtraperitoneally with 100 μg of OP-1 (307-431) and 30 μg of the N-terminal peptide (Ser 2 g 3 -Asn 30 g-Cys) conjugated through the added cysteine t bovine serum albumin with SMCC crosslinking agent. This boost was repeated five days (IP), four days (IP), three days (IP) and one day (IV) prior to fusion. The mouse spleen cells are then fused to myeloma (e.g., 653) cells at a ratio of 1:1 using PEG 1500 (Boeringer Mannheim), and the cell fusion is plated and screened for OP-1-specific antibodies using OP-1 (307-431) as antigen. The cell fusio and monoclonal screening then are according to standard procedures well described in standard texts widely availabl in the art. Example 4. Soluble Morphogen Complexes A currently preferred form of the morphogen useful in therapeutic formulations for systemic administration, having improved solubility in aqueous solutions and consisting essentially of amino acids, is a dimeric morphogenic protein comprising at least the 100 amino acid peptide sequence having the pattern of seven or more cysteine residues characteristic of the morphogen family complexed with a peptide comprising part or all of a pro region of a member of the morphogen family, or an allelic, species or other sequence variant thereof. Preferably, the dimeric morphogenic protein is complexed with two peptides. Also, the dimeric morphogenic protein preferably is noncovalently complexed with the pro region peptide or peptides. The pro region peptides also preferably comprise at least the N-terminal eighteen amino acids that define a given morphogen pro region. In a most preferred embodiment, peptides defining substantially the full length pro region are used. Other soluble forms of morphogens include dimers of the uncleaved pro forms of these proteins, as well as "hemi-dimers" wherein one subunit of the dimer is an uncleaved pro form of the protein, and the other subunit comprises the mature form of the protein, including truncated forms thereof, preferably noncovalently associated with a cleaved pro domain peptide. As described above, useful pro domains include the full length pro regions, as well as various truncated forms hereof, particularly truncated forms cleaved at proteolytic Arg-Xaa-Xaa-Arg cleavage sites. For example, in OP-1, possible pro sequences include sequences defined by residue 30-292 (full length form); 48-292; and 158-292. Soluble OP-1 complex stability is enhanced when the pro region comprises the full length form rather than a truncated form such as the 48-292 truncated form, in that residues 30-47 show sequence homology to the N-terminal portions of other morphogens, and are believed to have particular utility in enhancing complex stability for all morphogens. Accordingly, currently preferred pro sequences are those encoding the full length form of the pro region for a given morphogen. Other pro sequences contemplated to have utilit include biosynthetic pro sequences, particularly those that incorporate a sequence derived from the N-terminal portion of one or more morphogen pro sequences. As will be appreciated by those having ordinary skill i the art, useful sequences encoding the pro region may be obtained from genetic sequences encoding known morphogens. Alternatively, chimeric pro regions can be constructed from the sequences of one or more known morphogens. Still another option is to create a synthetic sequence variant of one or more known pro region sequences. In another preferred aspect, useful pro region peptides include polypeptide chains comprising an amino acid sequence encoded by a nucleic acid that hybridizes under stringent conditions with a DNA or RNA sequence encoding at least the N-terminal eighteen amino acids of the pro region sequence for OPl or OP2, e.g., nucleotides 136-192 and 152- 211 of Seq. ID No. 16 and 20, respectively. 4.1 Isolation of Soluble morphogen complex from conditioned media or body fluid Morphogens are expressed from mammalian cells as solubl complexes. Typically, however the complex is disassociated during purification, generally by exposure to denaturants often added to the purification solutions, such as detergents, alcohols, organic solvents, chaotropic agents and compounds added to reduce the pH of the solution. Provided below is a currently preferred protocol for purifying the soluble proteins from conditioned media (or, optionally, a body fluid such as serum, cerebro-spinal or peritoneal fluid), under non-denaturing conditions. The method is rapid, reproducible and yields isolated soluble morphogen complexes in substantially pure form. Soluble morphogen complexes can be isolated from conditioned media using a simple, three step chromatographi protocol performed in the absence of denaturants. The protocol involves running the media (or body fluid) over an affinity column, followed by ion exchange and gel filtratio chromatographies. The affinity column described below is a Zn-IMAC column. The present protocol has general applicability to the purification of a variety of morphogens, all of which are anticipated to be isolatable using only minor modifications of the protocol described below. An alternative protocol also envisioned to have utility an immunoaffinity column, created using standard procedures and, for example, using antibody specific for a given morphogen pro domain (complexed, for example, to a protein A-conjugated Sepharose column. ) Protocols for developing immunoaffinity columns are well described in the art, (see, for example. Guide to Protein Purification, M. Deutscher, ed.. Academic Press, San Diego, 1990, particularly sections VII and XI.) In this experiment OP-1 was expressed in mammalian CHO (Chinese hamster ovary) cells as described in the art (see. for example, international application US90/05903 (WO91/05802) . ) The CHO cell conditioned media containing 0.5% FBS was initially purified using Immobilized Metal-Ion Affinity Chromatography (IMAC). The soluble OP-1 complex from conditioned media binds very selectively to the Zn-IMA resin and a high concentration of imidazole (50 mM imidazole, pH 8.0) is required for the effective elution of the bound complex. The Zn-IMAC step separates the soluble OP-1 from the bulk of the contaminating serum proteins that elute in the flow through and 35 mM imidazole wash fractions. The Zn-IMAC purified soluble OP-1 is next applied to an S-Sepharose cation-exchange column equilibrated in 20 mM NaP0 4 (pH 7.0) with 50 mM NaCl. This S-Sepharose step serves to further purify and concentrate the soluble OP-1 complex in preparation for the following gel filtration step. The protein was applied to a Sephacry S-200HR column equilibrated in TBS. -Using substantially th same protocol, soluble morphogens also may be isolated from one or more body fluids, including serum, cerebro-spinal fluid or peritoneal fluid. IMAC was performed using Chelating-Sepharose (Pharmacia that had been charged with three column volumes of 0.2 M ZnSO.. The conditioned media was titrated to pH 7.0 and applied directly to the ZN-IMAC resin equilibrated in 20 mM HEPES (pH 7.0) with 500 mM NaCl. The Zn-IMAC resin was loaded with 80 mL of starting conditioned media per mL of resin. After loading, the column was washed with equilibration buffer and most of the contaminating proteins were eluted with 35 mM imidazole (pH 7.0) in equilibration buffer. The soluble OP-1 complex then is eluted with 50 mM imidazole (pH 8.0) in 20 mM HEPES and 500 mM NaCl. The 50 mM imidazole eluate containing the soluble OP-1 complex was diluted with nine volumes of 20 mM NaPO, (pH 7.0) and applied to an S-Sepharose (Pharmacia) column equilibrated in 20 mM NaP0 4 (pH 7.0) with 50 mM NaCl. The S-Sepharose resin was loaded with an equivalent of 800 mL o starting conditioned media per mL of resin. After loading the S-Sepharose column was washed with equilibration buffer and eluted with 100 mM NaCl followed by 300 mM and 500 mM NaCl in 20 mM NaPO. (pH 7.0). The 300 mM NaCl pool was further purified using gel filtration chromatography. Fift mis of the 300 mm NaCl eluate was applied to a 5.0 X 90 cm Sephacryl S-200HR (Pharmacia) equilibrated in Tris buffered saline (TBS), 50 mM Tris, 150 mM NaCl (pH 7.4). The column was eluted at a flow rate of 5 mL/minute collecting 10 mL fractions. The apparent molecular of the soluble OP-1 was determined by comparison to protein molecular weight standards (alcohol dehydrogenase (ADH, 150 kDa), bovine serum albumin (BSA, 68 kDa), carbonic anhydrase (CA, 30 kDa and cytochrome C (cyt C, 12.5 kDa). The purity of the S-20 column fractions was determined by separation on standard 15% polyacrylamide SDS gels stained with coomassie blue. The identity of the mature OP-1 and the pro-domain was determined by N-terminal sequence analysis after separation of the mature OP-1 from the pro-domain using standard reverse phase C18 HPLC. The soluble OP-1 complex elutes with an apparent molecular weight of 110 kDa. This agrees well with the predicted composition of the soluble OP-1 complex with one mature OP-1 dimer (35-36 kDa) associated with two pro-domains (39 kDa each). Purity of the final complex can be verified by running the appropriate fraction in a reduce 15% polyacrylamide gel. The complex components can be verified by running the complex-containing fraction from the S-200 or S-200HR columns over a reverse phase C18 HPLC column and eluting i an acetonitrile gradient (in 0.1% TFA), using standard procedures. The complex is dissociated by this step, and the pro domain and mature species elute as separate specie These separate species then can be subjected to N-terminal sequencing using standard procedures (see, for example. Guide to Protein Purification, M. Deutscher, ed. , Academic Press, San Diego, 1990, particularly pp. 602-613), and the identity of the isolated 36kD, 39kDa proteins confirmed as mature morphogen and isolated, cleaved pro domain, respectively. N-terminal sequencing of the isolated pro domain from mammalian cell produced OP-1 revealed 2 forms the pro region, the intact form (beginning at residue 30 o Seq. ID No. 16) and a truncated form, (beginning at residu 48 of Seq. ID No. 16.) N-terminal sequencing of the polypeptide subunit of the isolated mature species reveals range of N-termini for the mature sequence, beginning at residues 293, 300, 313, 315, 316, and 318, of Seq. ID No. 16, all of which are active as demonstrated by the standar bone induction assay. 4.2 In Vitro Soluble Morphogen Complex Formation As an alternative to purifying soluble complexes from culture media or a body fluid, soluble complexes may be formulated from purified pro domains and mature dimeric species. Successful complex formation apparently requires association of the components under denaturing conditions sufficient to relax the folded structure of these molecules without affecting disulfide bonds. Preferably, the denaturing conditions mimic the environment of an intracellular vesicle sufficiently such that the cleaved pr domain has an opportunity to associate with the mature dimeric species under relaxed folding conditions. The concentration of denaturant in the solution then is decreased in a controlled, preferably step-wise manner, so as to allow proper refolding of the dimer and pro regions while maintaining the association of the pro domain with th dimer. Useful denaturants include 4-6M urea or guanidine hydrochloride (GuHCl), in buffered solutions of pH 4-10, preferably pH 6-8. The soluble complex then is formed by controlled dialysis or dilution into a solution having a final denaturant concentration of less than 0.1-2M urea or GuHCl, preferably 1-2 M urea of GuHCl, which then preferabl can be diluted into a physiological buffer. Protein purification/renaturing procedures and considerations are well described in the art, and details for developing a suitable renaturing protocol readily can be determined by one having ordinary skill in the art. One useful text one the subject is Guide to Protein Purification, M. Deutscher, ed.. Academic Press, San Diego, 1990, particularly section V. Complex formation also may be aide by addition of one or more chaperone proteins. 4.3 Stability of Soluble Morphogen Complexes The stability of the highly purified soluble morphogen complex in a physiological buffer, e.g., tris-buffered saline (TBS) and phosphate-buffered saline (PBS), can be enhanced by any of a number of means. Currently preferred is by means of a pro region that comprises at least the first 18 amino acids of the pro sequence (e.g., residues 30-47 of Seq. ID NO. 16 for OP-1), and preferably is the full length pro region. Residues 30-47 show sequence homology to the N-terminal portion of other morphogens and are believed to have particular utility in enhancing comple stability for all morphogens. Other useful means for enhancing the stability of soluble morphogen complexes include three classes of additivres. These additives includ basic amino acids (e.g., L-arginine, lysine and betaine); nonionic detergents (e.g., Tween 80 or Nonldet P-120); and carrier proteins (e.g., serum albumin and casein). Useful concentrations of these additives include 1-100 mM, preferably 10-70 mM, including 50 mM, basic amino acid;, 0.01-1.0%, preferably 0.05-0.2%, including 0.1% (v/v) nonionic detergent;, and 0.01-1.0%, preferably 0.05-0.2%, including 0.1% (w/v) carrier protein. The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within t meaning and range of equivalency of the claims are therefo intended to be embraced therein. SEQUENCE LISTING (1) GENERAL INFORMATION: (i) APPLICANT: (A) NAME: CREATIVE BIOMOLECULES, INC. (B) STREET: 45 SOUTH STREET (C) CITY: HOPKINTON (D) STATE: MA (E) COUNTRY: USA (F) POSTAL CODE (ZIP): 01748 (G) TELEPHONE: 1-508-435-9001 (H) TELEFAX: 1-508-435-0454 (I) TELEX: (ii) TITLE OF INVENTION: MORPHOGEN-INDUCED PERIODONTAL TISSUE REGENERATION (iii) NUMBER OF SEQUENCES: 33 (iv) CORRESPONDENCE ADDRESS: (A) ADDRESSEE: CREATIVE BIOMOLECULES, INC. (B) STREET: 45 SOUTH STREET (C) CITY: HOPKINTON (D) STATE: MA (E) COUNTRY: USA (F) ZIP: 01748 (v) COMPUTER READABLE FORM: (A) MEDIUM TYPE: Floppy disk (B) COMPUTER: IBM PC compatible (C) OPERATING SYSTEM: PC-DOS/MS-DOS (D) SOFTWARE: Patentin Release #1.0, Version #1.25 (vi) CURRENT APPLICATION DATA: (A) APPLICATION NUMBER: (B) FILING DATE: (C) CLASSIFICATION: (vii) PRIOR APPLICATION DATA: (A) APPLICATION NUMBER: (B) FILING DATE: (viii) ATTORNEY/AGENT INFORMATION: (A) NAME: KELLEY ESQ, ROBIN D. (B) REGISTRATION NUMBER: 34,637 (C) REFERENCE/DOCKET NUMBER: CRP-067 (ix) TELECOMMUNICATION INFORMATION: (A) TELEPHONE: 617/248-7477 (B) TELEFAX: 617/248-7100 (2) INFORMATION FOR SEQ ID N0:1: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 97 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..97 (D) OTHER INFORMATION: /label= GENERIC-SEQ1 /note= "WHEREIN EACH XAA INDEPENDENTLY INDICATES ONE OF THE 20 NATURALLY-OCCURING L-ISOMER, A-AMINO ACIDS, OR A DERIVATIVE THEREOF." (xi) SEQUENCE DESCRIPTION: SEQ ID NO:l: Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 10 15 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Xaa 20 25 30 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 35 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Cys Xaa Xaa 50 55 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 65 70 75 80 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys 85 90 95 Xaa (2) INFORMATION FOR SEQ ID NO:2: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 97 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..97 (D) OTHER INFORMATION: /label= GENERIC-SEQ2 /note= "WHEREIN EACH XAA INDEPENDENTLY INDICATES ONE OF THE 20 NATURALLY OCCURING L-ISOMER A-AMINO ACIDS, OR A DERIVATIVE THEREOF." (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2: Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 1 5 10 15 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Xaa 20 25 30 Xaa Xaa Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 35 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Cys Xaa Xaa 50 55 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 65 70 75 80 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys 85 90 95 Xaa (2) INFORMATION FOR SEQ ID NO:3: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 97 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..97 (D) OTHER INFORMATION: /label= GENERIC-SEQ3 /note= "WHEREIN EACH XAA IS INDEPENDENTLY SELECTED FROM A GROUP OF ONE OR MORE SPECIFIED AMINO ACIDS AS DEFINED IN THE SPECIFICATION." (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3: Leu Tyr Val Xaa Phe Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa Xaa Ala 1 5 10 15 Pro Xaa Gly Xaa Xaa Ala Xaa Tyr Cys Xaa Gly Xaa Cys Xaa Xaa Pro 20 25 30 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Asn His Ala Xaa Xaa Xaa Xaa Leu 35 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Cys Xaa Pro 50 55 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Leu Xaa Xaa Xaa Xaa Xaa Xaa Xaa 65 70 75 80 Val Xaa Leu Xaa Xaa Xaa Xaa Xaa Met Xaa Val Xaa Xaa Cys Gly Cys 85 90 95 Xaa (2) INFORMATION FOR SEQ ID NO:4: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /label= GENERIC-SEQ4 /note= "WHEREIN EACH XAA IS INDEPENDENTLY SELECTED FROM A GROUP OF ONE OR MORE SPECIFIED AMINO ACIDS AS DEFINED IN THE SPECIFICATION." (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4: Cys Xaa Xaa Xaa Xaa Leu Tyr Val Xaa Phe Xaa Xaa Xaa Gly Trp Xaa 1 5 10 15 Xaa Trp Xaa Xaa Ala Pro Xaa Gly Xaa Xaa Ala Xaa Tyr Cys Xaa Gly 20 25 30 Xaa Cys Xaa Xaa Pro Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Asn His Ala 35 40 45 Xaa Xaa Xaa Xaa Leu Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 50 55 60 Xaa Cys Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Leu Xaa Xaa 65 70 75 80 Xaa Xaa Xaa Xaa Xaa Val Xaa Leu Xaa Xaa Xaa Xaa Xaa Met Xaa Val 85 90 95 Xaa Xaa Cys Gly Cys Xaa 100 (2) INFORMATION FOR SEQ ID NO:5: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 139 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: Homo sapiens (F) TISSUE TYPE: HIPPOCAMPUS (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..139 (D) OTHER INFORMATION: /label= hOPl-MATURE (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5: Ser Thr Gly Ser Lys Gin Arg Ser Gin Asn Arg Ser Lys Thr Pro Lys 1 5 10 15 Asn Gin Glu Ala Leu Arg Met Ala Asn Val Ala Glu Asn Ser Ser Ser 20 25 30 Asp Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr Val Ser Phe Arg 35 40 45 Asp Leu Gly Trp Gin Asp Trp He He Ala Pro Glu Gly Tyr Ala Ala 50 55 60 Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn Ser Tyr Met Asn 65 70 75 80 Ala Thr Asn His Ala He Val Gin Thr Leu Val His Phe He Asn Pro 85 90 95 Glu Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin Leu Asn Ala He 100 105 110 Ser Val Leu Tyr Phe Asp Asp Ser Ser Asn Val He Leu Lys Lys Tyr 115 120 125 Arg Asn Met Val Val Arg Ala Cys Gly Cys His 130 135 (2) INFORMATION FOR SEQ ID NO:6: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 139 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: MURIDAE (F) TISSUE TYPE: EMBRYO (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..139 (D) OTHER INFORMATION: /label= M0P1-MATURE (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6: Ser Thr Gly Gly Lys Gin Arg Ser Gin Asn Arg Ser Lys Thr Pro Lys 1 5 10 15 Asn Gin Glu Ala Leu Arg Met Ala Ser Val Ala Glu Asn Ser Ser Ser 20 25 30 Asp Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr Val Ser Phe Arg 35 40 45 Asp Leu Gly Trp Gin Asp Trp He He Ala Pro Glu Gly Tyr Ala Ala 50 55 60 Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn Ser Tyr Met Asn 65 70 75 80 Ala Thr Asn His Ala He Val Gin Thr Leu Val His Phe He Asn Pro 85 90 95 Asp Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin Leu Asn Ala He 100 105 110 Ser Val Leu Tyr Phe Asp Asp Ser Ser Asn Val He Leu Lys Lys Tyr 115 120 125 Arg Asn Met Val Val Arg Ala Cys Gly Cys His 130 135 (2) INFORMATION FOR SEQ ID NO:7: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 139 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS (F) TISSUE TYPE: HIPPOCAMPUS (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..139 (D) OTHER INFORMATION: /label= H0P2-MATURE (xi) SEQUENCE DESCRIPTION: SEQ ID NO:7: Ala Val Arg Pro Leu Arg Arg Arg Gin Pro Lys Lys Ser Asn Glu Leu 1 5 10 15 Pro Gin Ala Asn Arg Leu Pro Gly He Phe Asp Asp Val His Gly Ser 20 25 30 His Gly Arg Gin Val Cys Arg Arg His Glu Leu Tyr Val Ser Phe Gin 35 40 45 Asp Leu Gly Trp Leu Asp Trp Val He Ala Pro Gin Gly Tyr Ser Ala 50 55 60 Tyr Tyr Cys Glu Gly Glu Cys Ser Phe Pro Leu Asp Ser Cys Met Asn 65 70 75 80 Ala Thr Asn His Ala He Leu Gin Ser Leu Val His Leu Met Lys Pro 85 90 95 Asn Ala Val Pro Lys Ala Cys Cys Ala Pro Thr Lys Leu Ser Ala Thr 100 105 110 Ser Val Leu Tyr Tyr Asp Ser Ser Asn Asn Val He Leu Arg Lys His 115 120 125 Arg Asn Met Val Val Lys Ala Cys Gly Cys His 130 135 (2) INFORMATION FOR SEQ ID NO:8: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 139 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: MURIDAE (F) TISSUE TYPE: EMBRYO (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..139 (D) OTHER INFORMATION: /label= M0P2-MATURE (xi) SEQUENCE DESCRIPTION: SEQ ID NO:8: Ala Ala Arg Pro Leu Lys Arg Arg Gin Pro Lys Lys Thr Asn Glu Leu 1 5 10 15 Pro His Pro Asn Lys Leu Pro Gly He Phe Asp Asp Gly His Gly Ser 20 25 30 Arg Gly Arg Glu Val Cys Arg Arg His Glu Leu Tyr Val Ser Phe Arg 35 40 45 Asp Leu Gly Trp Leu Asp Trp Val He Ala Pro Gin Gly Tyr Ser Ala 50 55 60 Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asp Ser Cys Met Asn 65 70 75 80 Ala Thr Asn His Ala He Leu Gin Ser Leu Val His Leu Met Lys Pro 85 90 95 Asp Val Val Pro Lys Ala Cys Cys Ala Pro Thr Lys Leu Ser Ala Thr 100 105 110 Ser Val Leu Tyr Tyr Asp Ser Ser Asn Asn Val He Leu Arg Lys His 115 120 125 Arg Asn Met Val Val Lys Ala Cys Gly Cys His 130 135 (2) INFORMATION FOR SEQ ID NO:9: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 101 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: bovinae (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..101 (D) OTHER INFORMATION: /label= CBMP-2A-FX (xi) SEQUENCE DESCRIPTION: SEQ ID NO:9: Cys Lys Arg His Pro Leu Tyr Val Asp Phe Ser Asp Val Gly Trp Asn 1 5 10 15 Asp Trp He Val Ala Pro Pro Gly Tyr His Ala Phe Tyr Cys His Gly 20 25 30 Glu Cys Pro Phe Pro Leu Ala Asp His Leu Asn Ser Thr Asn His Ala 35 40 45 He Val Gin Thr Leu Val Asn Ser Val Asn Ser Lys He Pro Lys Ala 50 55 60 Cys Cys Val Pro Thr Glu Leu Ser Ala He Ser Met Leu Tyr Leu Asp 65 70 75 80 Glu Asn Glu Lys Val Val Leu Lys Asn Tyr Gin Asp Met Val Val Glu 85 90 95 Gly Cys Gly Cys Arg 100 (2) INFORMATION FOR SEQ ID NO:10: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 101 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS (F) TISSUE TYPE: hippocampus (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..101 (D) OTHER INFORMATION: /label= CBMP-2B-FX (xi) SEQUENCE DESCRIPTION: SEQ ID NO:10: Cys Arg Arg His Ser Leu Tyr Val Asp Phe Ser Asp Val Gly Trp Asn 1 5 10 15 Asp Trp He Val Ala Pro Pro Gly Tyr Gin Ala Phe Tyr Cys His Gly 20 25 30 Asp Cys Pro Phe Pro Leu Ala Asp His Leu Asn Ser Thr Asn His Ala 35 40 45 He Val Gin Thr Leu Val Asn Ser Val Asn Ser Ser He Pro Lys Ala 50 55 60. Cys Cys Val Pro Thr Glu Leu Ser Ala He Ser Met Leu Tyr Leu Asp 65 70 75 80 Glu Tyr Asp Lys Val Val Leu Lys Asn Tyr Gin Glu Met Val Val Glu 85 90 95 Gly Cys Gly Cys Arg 100 (2) INFORMATION FOR SEQ ID NO:11: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: DROSOPHILA MELANOGASTER (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..101 (D) OTHER INFORMATION: /label= DPP-FX (xi) SEQUENCE DESCRIPTION: SEQ ID NO:11: Cys Arg Arg His Ser Leu Tyr Val Asp Phe Ser Asp Val Gly Trp Asp 1 5 10 15 Asp Trp He Val Ala Pro Leu Gly Tyr Asp Ala Tyr Tyr Cys His Gly 20 25 30 Lys Cys Pro Phe Pro Leu Ala Asp His Phe Asn Ser Thr Asn His Ala 35 40 45 Val Val Gin Thr Leu Val Asn Asn Asn Asn Pro Gly Lys Val Pro Lys 50 55 60 Ala Cys Cys Val Pro Thr Gin Leu Asp Ser Val Ala Met Leu Tyr Leu 65 70 75 80 Asn Asp Gin Ser Thr Val Val Leu Lys Asn Tyr Gin Glu Met Thr Val 85 90 95 Val Gly Cys Gly Cys Arg 100 (2) INFORMATION FOR SEQ ID NO:12: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: XENOPUS (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /label= VGL-FX (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 12 : Cys Lys Lys Arg His Leu Tyr Val Glu Phe Lys Asp Val Gly Trp Gin 1 5 10 15 Asn Trp Val He Ala Pro Gin Gly Tyr Met Ala Asn Tyr Cys Tyr Gly 20 25 30 Glu Cys Pro Tyr Pro Leu Thr Glu He Leu Asn Gly Ser Asn His Ala 35 40 45 He Leu Gin Thr Leu Val His Ser He Glu Pro Glu Asp He Pro Leu 50 55 60 Pro Cys Cys Val Pro Thr Lys Met Ser Pro He Ser Met Leu Phe Tyr 65 70 75 80 Asp Asn Asn Asp Asn Val Val Leu Arg His Tyr Glu Asn Met Ala Val 85 90 95 Asp Glu Cys Gly Cys Arg 100 (2) INFORMATION FOR SEQ ID NO:13: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: MURIDAE (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /label= VGR-l-FX (xi) SEQUENCE DESCRIPTION: SEQ ID NO:13: Cys Lys Lys His Glu Leu Tyr Val Ser Phe Gin Asp Val Gly Trp Gin 1 5 10 15 Asp Trp He He Ala Pro Lys Gly Tyr Ala Ala Asn Tyr Cys Asp Gly 20 25 30 Glu Cys Ser Phe Pro Leu Asn Ala His Met Asn Ala Thr Asn His Ala 35 40 45 He Val Gin Thr Leu Val His Val Met Asn Pro Glu Tyr Val Pro Lys 50 55 60 Pro Cys Cys Ala Pro Thr Lys Val Asn Ala He Ser Val Leu Tyr Phe 65 70 75 80 Asp Asp Asn Ser Asn Val He Leu Lys Lys Tyr Arg Asn Met Val Val 85 90 95 Arg Ala Cys Gly Cys His 100 (2) INFORMATION FOR SEQ ID NO:14: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 106 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (iii) HYPOTHETICAL: NO (iv) ANTI-SENSE: NO (vi) ORIGINAL SOURCE: (A) ORGANISM: Homo sapiens (F) TISSUE TYPE: brain (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..106 (D) OTHER INFORMATION: /note= "GDF-1 (fx)" ( i) SEQUENCE DESCRIPTION: SEQ ID NO:14: Cys Arg Ala Arg Arg Leu Tyr Val Ser Phe Arg Glu Val Gly Trp His 1 5 10 15 Arg Trp Val He Ala Pro Arg Gly Phe Leu Ala Asn Tyr Cys Gin Gly 20 25 30 Gin Cys Ala Leu Pro Val Ala Leu Ser Gly Ser Gly Gly Pro Pro Ala 35 40 45 Leu Asn His Ala Val Leu Arg Ala Leu Met His Ala Ala Ala Pro Gly 50 55 60 Ala Ala Asp Leu Pro Cys Cys Val Pro Ala Arg Leu Ser Pro He Ser 65 70 75 80 Val Leu Phe Phe Asp Asn Ser Asp Asn Val Val Leu Arg Gin Tyr Glu 85 90 95 Asp Met Val Val Asp Glu Cys Gly Cys Arg 100 105 (2) INFORMATION FOR SEQ ID NO:15: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (xi) SEQUENCE DESCRIPTION: SEQ ID NO:15: Cys Xaa Xaa Xaa Xaa 1 5 (2) INFORMATION FOR SEQ ID NO:16: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1822 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (iv) ANTI-SENSE: NO (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS (F) TISSUE TYPE: HIPPOCAMPUS (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 49..1341 (C) IDENTIFICATION METHOD: experimental (D) OTHER INFORMATION: /function= "OSTEOGENIC PROTEIN" /product= "OPl" /evidence= EXPERIMENTAL /standard name= "OPl" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:16: GGTGCGGGCC CGGAGCCCGG AGCCCGGGTA GCGCGTAGAG CCGGCGCG ATG CAC GTG 57 Met His Val 1 CGC TCA CTG CGA GCT GCG GCG CCG CAC AGC TTC GTG GCG CTC TGG GCA 105 Arg Ser Leu Arg Ala Ala Ala Pro His Ser Phe Val Ala Leu Trp Ala 5 10 15 CCC CTG TTC CTG CTG CGC TCC GCC CTG GCC GAC TTC AGC CTG GAC AAC 153 Pro Leu Phe Leu Leu Arg Ser Ala Leu Ala Asp Phe Ser Leu Asp Asn 20 25 30 35 GAG GTG CAC TCG AGC TTC ATC CAC CGG CGC CTC CGC AGC CAG GAG CGG 201 Glu Val His Ser Ser Phe He His Arg Arg Leu Arg Ser Gin Glu Arg 40 45 50 CGG GAG ATG CAG CGC GAG ATC CTC TCC ATT TTG GGC TTG CCC CAC CGC 249 Arg Glu Met Gin Arg Glu He Leu Ser He Leu Gly Leu Pro His Arg 55 60 65 CCG CGC CCG CAC CTC CAG GGC AAG CAC AAC TCG GCA CCC ATG TTC ATG 297 Pro Arg Pro His Leu Gin Gly Lys His Asn Ser Ala Pro Met Phe Met 70 75 80 CTG GAC CTG TAC AAC GCC ATG GCG GTG GAG GAG GGC GGC GGG CCC GGC 345 Leu Asp Leu Tyr Asn Ala Met Ala Val Glu Glu Gly Gly Gly Pro Gly 85 90 95 GGC CAG GGC TTC TCC TAC CCC TAC AAG GCC GTC TTC AGT ACC CAG GGC 393 Gly Gin Gly Phe Ser Tyr Pro Tyr Lys Ala Val Phe Ser Thr Gin Gly 100 105 110 115 CCC CCT CTG GCC AGC CTG CAA GAT AGC CAT TTC CTC ACC GAC GCC GAC 441 Pro Pro Leu Ala Ser Leu Gin Asp Ser His Phe Leu Thr Asp Ala Asp 120 125 130 ATG GTC ATG AGC TTC GTC AAC CTC GTG GAA CAT GAC AAG GAA TTC TTC 489 Met Val Met Ser Phe Val Asn Leu Val Glu His Asp Lys Glu Phe Phe 135 140 145 CAC CCA CGC TAC CAC CAT CGA GAG TTC CGG TTT GAT CTT TCC AAG ATC 537 His Pro Arg Tyr His His Arg Glu Phe Arg Phe Asp Leu Ser Lys He 150 155 160 CCA GAA GGG GAA GCT GTC ACG GCA GCC GAA TTC CGG ATC TAC AAG GAC 585 Pro Glu Gly Glu Ala Val Thr Ala Ala Glu Phe Arg He Tyr Lys Asp 165 170 175 TAC ATC CGG GAA CGC TTC GAC AAT GAG ACG TTC CGG ATC AGC GTT TAT 633 Tyr He Arg Glu Arg Phe Asp Asn Glu Thr Phe Arg He Ser Val Tyr 180 185 190 195 CAG GTG CTC CAG GAG CAC TTG GGC AGG GAA TCG GAT CTC TTC CTG CTC 681 Gin Val Leu Gin Glu His Leu Gly Arg Glu Ser Asp Leu Phe Leu Leu 200 205 210 GAC AGC CGT ACC CTC TGG GCC TCG GAG GAG GGC TGG CTG GTG TTT GAC 729 Asp Ser Arg Thr Leu Trp Ala Ser Glu Glu Gly Trp Leu Val Phe Asp 215 220 225 ATC ACA GCC ACC AGC AAC CAC TGG GTG GTC AAT CCG CGG CAC AAC CTG 777 He Thr Ala Thr Ser Asn His Trp Val Val Asn Pro Arg His Asn Leu 230 235 240 GGC CTG CAG CTC TCG GTG GAG ACG CTG GAT GGG CAG AGC ATC AAC CCC 825 Gly Leu Gin Leu Ser Val Glu Thr Leu Asp Gly Gin Ser He Asn Pro 245 250 255 AAG TTG GCG GGC CTG ATT GGG CGG CAC GGG CCC CAG AAC AAG CAG CCC 873 Lys Leu Ala Gly Leu He Gly Arg His Gly Pro Gin Asn Lys Gin Pro 260 265 270 275 TTC ATG GTG GCT TTC TTC AAG GCC ACG GAG GTC CAC TTC CGC AGC ATC 921 Phe Met Val Ala Phe Phe Lys Ala Thr Glu Val His Phe Arg Ser He 280 285 290 CGG TCC ACG GGG AGC AAA CAG CGC AGC CAG AAC CGC TCC AAG ACG CCC 969 Arg Ser Thr Gly Ser Lys Gin Arg Ser Gin Asn Arg Ser Lys Thr Pro 295 300 305 AAG AAC CAG GAA GCC CTG CGG ATG GCC AAC GTG GCA GAG AAC AGC AGC 1017 Lys Asn Gin Glu Ala Leu Arg Met Ala Asn Val Ala Glu Asn Ser Ser 310 315 320 AGC GAC CAG AGG CAG GCC TGT AAG AAG CAC GAG CTG TAT GTC AGC TTC 1065 Ser Asp Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr Val Ser Phe 325 330 335 CGA GAC CTG GGC TGG CAG GAC TGG ATC ATC GCG CCT GAA GGC TAC GCC 1113 Arg Asp Leu Gly Trp Gin Asp Trp He He Ala Pro Glu Gly Tyr Ala 340 345 350 355 GCC TAC TAC TGT GAG GGG GAG TGT GCC TTC CCT CTG AAC TCC TAC ATG 1161 Ala Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn Ser Tyr Met 360 365 370 AAC GCC ACC AAC CAC GCC ATC GTG CAG ACG CTG GTC CAC TTC ATC AAC 1209 Asn Ala Thr Asn His Ala He Val Gin Thr Leu Val His Phe He Asn 375 380 385 CCG GAA ACG GTG CCC AAG CCC TGC TGT GCG CCC ACG CAG CTC AAT GCC 1257 Pro Glu Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin Leu Asn Ala 390 395 400 ATC TCC GTC CTC TAC TTC GAT GAC AGC TCC AAC GTC ATC CTG AAG AAA 1305 He Ser Val Leu Tyr Phe Asp Asp Ser Ser Asn Val He Leu Lys Lys 405 410 415 TAC AGA AAC ATG GTG GTC CGG GCC TGT GGC TGC CAC TAGCTCCTCC 1351 Tyr Arg Asn Met Val Val Arg Ala Cys Gly Cys His 420 425 430 GAGAATTCAG ACCCTTTGGG GCCAAGTTTT TCTGGATCCT CCATTGCTCG CCTTGGCCAG 1411 GAACCAGCAG ACCAACTGCC TTTTGTGAGA CCTTCCCCTC CCTATCCCCA ACTTTAAAGG 1471 TGTGAGAGTA TTAGGAAACA TGAGCAGCAT ATGGCTTTTG ATCAGTTTTT CAGTGGCAGC 1531 ATCCAATGAA CAAGATCCTA CAAGCTGTGC AGGCAAAACC TAGCAGGAAA AAAAAACAAC 1591 GCATAAAGAA AAATGGCCGG GCCAGGTCAT TGGCTGGGAA GTCTCAGCCA TGCACGGACT 1651 CGTTTCCAGA GGTAATTATG AGCGCCTACC AGCCAGGCCA CCCAGCCGTG GGAGGAAGGG 1711 GGCGTGGCAA GGGGTGGGCA CATTGGTGTC TGTGCGAAAG GAAAATTGAC CCGGAAGTTC 1771 CTGTAATAAA TGTCACAATA AAACGAATGA ATGAAAAAAA AAAAAAAAAA A 1822 (2) INFORMATION FOR SEQ ID NO:17: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 431 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:17: Met His Val Arg Ser Leu Arg Ala Ala Ala Pro His Ser Phe Val Ala 1 5 10 15 Leu Trp Ala Pro Leu Phe Leu Leu Arg Ser Ala Leu Ala Asp Phe Ser 20 25 30 Leu Asp Asn Glu Val His Ser Ser Phe He His Arg Arg Leu Arg Ser 35 40 45 Gin Glu Arg Arg Glu Met Gin Arg Glu He Leu Ser He Leu Gly Leu 50 55 60 Pro His Arg Pro Arg Pro His Leu Gin Gly Lys His Asn Ser Ala Pro 65 70 75 80 Met Phe Met Leu Asp Leu Tyr Asn Ala Met Ala Val Glu Glu Gly Gly 85 90 95 Gly Pro Gly Gly Gin Gly Phe Ser Tyr Pro Tyr Lys Ala Val Phe Ser 100 105 110 Thr Gin Gly Pro Pro Leu Ala Ser Leu Gin Asp Ser His Phe Leu Thr 115 120 125 Asp Ala Asp Met Val Met Ser Phe Val Asn Leu Val Glu His Asp Lys 130 135 140 Glu Phe Phe His Pro Arg Tyr His His Arg Glu Phe Arg Phe Asp Leu 145 150 155 160 Ser Lys He Pro Glu Gly Glu Ala Val Thr Ala Ala Glu Phe Arg He 165 170 175 Tyr Lys Asp Tyr He Arg Glu Arg Phe Asp Asn Glu Thr Phe Arg He 180 185 190 Ser Val Tyr Gin Val Leu Gin Glu His Leu Gly Arg Glu Ser Asp Leu 195 200 205 Phe Leu Leu Asp Ser Arg Thr Leu Trp Ala Ser Glu Glu Gly Trp Leu 210 215 220 Val Phe Asp He Thr Ala Thr Ser Asn His Trp Val Val Asn Pro Arg 225 230 235 240 His Asn Leu Gly Leu Gin Leu Ser Val Glu Thr Leu Asp Gly Gin Ser 245 250 255 He Asn Pro Lys Leu Ala Gly Leu He Gly Arg His Gly Pro Gin Asn 260 265 270 Lys Gin Pro Phe Met Val Ala Phe Phe Lys Ala Thr Glu Val His Phe 275 280 285 Arg Ser He Arg Ser Thr Gly Ser Lys Gin Arg Ser Gin Asn Arg Ser 290 295 300 Lys Thr Pro Lys Asn Gin Glu Ala Leu Arg Met Ala Asn Val Ala Glu 305 310 315 320 Asn Ser Ser Ser Asp Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr 325 330 335 Val Ser Phe Arg Asp Leu Gly Trp Gin Asp Trp He He Ala Pro Glu 340 345 350 Gly Tyr Ala Ala Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn 355 360 365 Ser Tyr Met Asn Ala Thr Asn His Ala He Val Gin Thr Leu Val His 370 375 380 Phe He Asn Pro Glu Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin 385 390 395 400 Leu Asn Ala He Ser Val Leu Tyr Phe Asp Asp Ser Ser Asn Val He 405 410 415 Leu Lys Lys Tyr Arg Asn Met Val Val Arg Ala Cys Gly Cys His 420 425 430 (2) INFORMATION FOR SEQ ID NO:18: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1873 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (iv) ANTI-SENSE: NO (vi) ORIGINAL SOURCE: (A) ORGANISM: MURIDAE (F) TISSUE TYPE: EMBRYO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 104..1393 (D) OTHER INFORMATION: /function= "OSTEOGENIC PROTEIN" /product= "MOPl" /note= "MOPl (CDNA)" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:18: CTGCAGCAAG TGACCTCGGG TCGTGGACCG CTGCCCTGCC CCCTCCGCTG CCACCTGGGG 60 CGGCGCGGGC CCGGTGCCCC GGATCGCGCG TAGAGCCGGC GCG ATG CAC GTG CGC 115 Met His Val Arg 1 TCG CTG CGC GCT GCG GCG CCA CAC AGC TTC GTG GCG CTC TGG GCG CCT 163 Ser Leu Arg Ala Ala Ala Pro His Ser Phe Val Ala Leu Trp Ala Pro 5 10 15 20 CTG TTC TTG CTG CGC TCC GCC CTG GCC GAT TTC AGC CTG GAC AAC GAG 211 Leu Phe Leu Leu Arg Ser Ala Leu Ala Asp Phe Ser Leu Asp Asn Glu 25 30 35 GTG CAC TCC AGC TTC ATC CAC CGG CGC CTC CGC AGC CAG GAG CGG CGG 259 Val His Ser Ser Phe He His Arg Arg Leu Arg Ser Gin Glu Arg Arg 40 45 50 GAG ATG CAG CGG GAG ATC CTG TCC ATC TTA GGG TTG CCC CAT CGC CCG 307 Glu Met Gin Arg Glu He Leu Ser He Leu Gly Leu Pro His Arg Pro 55 60 65 CGC CCG CAC CTC CAG GGA AAG CAT AAT TCG GCG CCC ATG TTC ATG TTG 355 Arg Pro His Leu Gin Gly Lys His Asn Ser Ala Pro Met Phe Met Leu 70 75 80 GAC CTG TAC AAC GCC ATG GCG GTG GAG GAG AGC GGG CCG GAC GGA CAG 403 Asp Leu Tyr Asn Ala Met Ala Val Glu Glu Ser Gly Pro Asp Gly Gin 85 90 95 100 GGC TTC TCC TAC CCC TAC AAG GCC GTC TTC AGT ACC CAG GGC CCC CCT 451 Gly Phe Ser Tyr Pro Tyr Lys Ala Val Phe Ser Thr Gin Gly Pro Pro 105 110 115 TTA GCC AGC CTG CAG GAC AGC CAT TTC CTC ACT GAC GCC GAC ATG GTC 499 Leu Ala Ser Leu Gin Asp Ser His Phe Leu Thr Asp Ala Asp Met Val 120 125 130 ATG AGC TTC GTC AAC CTA GTG GAA CAT GAC AAA GAA TTC TTC CAC CCT 547 Met Ser Phe Val Asn Leu Val Glu His Asp Lys Glu Phe Phe His Pro 135 140 145 CGA TAC CAC CAT CGG GAG TTC CGG TTT GAT CTT TCC AAG ATC CCC GAG 595 Arg Tyr His His Arg Glu Phe Arg Phe Asp Leu Ser Lys He Pro Glu 150 155 160 GGC GAA CGG GTG ACC GCA GCC GAA TTC AGG ATC TAT AAG GAC TAC ATC 643 Gly Glu Arg Val Thr Ala Ala Glu Phe Arg He Tyr Lys Asp Tyr He 165 170 175 180 CGG GAG CGA TTT GAC AAC GAG ACC TTC CAG ATC ACA GTC TAT CAG GTG 691 Arg Glu Arg Phe Asp Asn Glu Thr Phe Gin He Thr Val Tyr Gin Val 185 190 195 CTC CAG GAG CAC TCA GGC AGG GAG TCG GAC CTC TTC TTG CTG GAC AGC 739 Leu Gin Glu His Ser Gly Arg Glu Ser Asp Leu Phe Leu Leu Asp Ser 200 205 210 CGC ACC ATC TGG GCT TCT GAG GAG GGC TGG TTG GTG TTT GAT ATC ACA 787 Arg Thr He Trp Ala Ser Glu Glu Gly Trp Leu Val Phe Asp He Thr 215 220 225 GCC ACC AGC AAC CAC TGG GTG GTC AAC CCT CGG CAC AAC CTG GGC TTA 835 Ala Thr Ser Asn His Trp Val Val Asn Pro Arg His Asn Leu Gly Leu 230 235 240 CAG CTC TCT GTG GAG ACC CTG GAT GGG CAG AGC ATC AAC CCC AAG TTG 883 Gin Leu Ser Val Glu Thr Leu Asp Gly Gin Ser He Asn Pro Lys Leu 245 250 255 260 GCA GGC CTG ATT GGA CGG CAT GGA CCC CAG AAC AAG CAA CCC TTC ATG 931 Ala Gly Leu He Gly Arg His Gly Pro Gin Asn Lys Gin Pro Phe Met 265 270 275 GTG GCC TTC TTC AAG GCC ACG GAA GTC CAT CTC CGT AGT ATC CGG TCC 979 Val Ala Phe Phe Lys Ala Thr Glu Val His Leu Arg Ser He Arg Ser 280 285 290 ACG GGG GGC AAG CAG CGC AGC CAG AAT CGC TCC AAG ACG CCA AAG AAC 1027 Thr Gly Gly Lys Gin Arg Ser Gin Asn Arg Ser Lys Thr Pro Lys Asn 295 300 305 CAA GAG GCC CTG AGG ATG GCC AGT GTG GCA GAA AAC AGC AGC AGT GAC 1075 Gin Glu Ala Leu Arg Met Ala Ser Val Ala Glu Asn Ser Ser Ser Asp 310 315 320 CAG AGG CAG GCC TGC AAG AAA CAT GAG CTG TAC GTC AGC TTC CGA GAC 1123 Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr Val Ser Phe Arg Asp 325 330 335 340 CTT GGC TGG CAG GAC TGG ATC ATT GCA CCT GAA GGC TAT GCT GCC TAC 1171 Leu Gly Trp Gin Asp Trp He He Ala Pro Glu Gly Tyr Ala Ala Tyr 345 350 355 TAC TGT GAG GGA GAG TGC GCC TTC CCT CTG AAC TCC TAC ATG AAC GCC 1219 Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn Ser Tyr Met Asn Ala 360 365 370 ACC AAC CAC GCC ATC GTC CAG ACA CTG GTT CAC TTC ATC AAC CCA GAC 1267 Thr Asn His Ala He Val Gin Thr Leu Val His Phe He Asn Pro Asp 375 380 385 ACA GTA CCC AAG CCC TGC TGT GCG CCC ACC CAG CTC AAC GCC ATC TCT 1315 Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin Leu Asn Ala He Ser 390 395 400 GTC CTC TAC TTC GAC GAC AGC TCT AAT GTC GAC CTG AAG AAG TAC AGA 1363 Val Leu Tyr Phe Asp Asp Ser Ser Asn Val Asp Leu Lys Lys Tyr Arg 405 410 415 420 AAC ATG GTG GTC CGG GCC TGT GGC TGC CAC TAGCTCTTCC TGAGACCCTG 1413 Asn Met Val Val Arg Ala Cys Gly Cys His 425 430 ACCTTTGCGG GGCCACACCT TTCCAAATCT TCGATGTCTC ACCATCTAAG TCTCTCACTG 1473 CCCACCTTGG CGAGGAGAAC AGACCAACCT CTCCTGAGCC TTCCCTCACC TCCCAACCGG 1533 AAGCATGTAA GGGTTCCAGA AACCTGAGCG TGCAGCAGCT GATGAGCGCC CTTTCCTTCT 1593 GGCACGTGAC GGACAAGATC CTACCAGCTA CCACAGCAAA CGCCTAAGAG CAGGAAAAAT 1653 GTCTGCCAGG AAAGTGTCCA GTGTCCACAT GGCCCCTGGC GCTCTGAGTC TTTGAGGAGT 1713 AATCGCAAGC CTCGTTCAGC TGCAGCAGAA GGAAGGGCTT AGCCAGGGTG GGCGCTGGCG 1773 TCTGTGTTGA AGGGAAACCA AGCAGAAGCC ACTGTAATGA TATGTCACAA TAAAACCCAT 1833 GAATGAAAAA AAAAAAAAAA AAAAAAAAAA AAAAGAATTC 1873 (2) INFORMATION FOR SEQ ID NO:19: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 430 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:19: Met His Val Arg Ser Leu Arg Ala Ala Ala Pro His Ser Phe Val Ala 1 5 10 15 Leu Trp Ala Pro Leu Phe Leu Leu Arg Ser Ala Leu Ala Asp Phe Ser 20 25 30 Leu Asp Asn Glu Val His Ser Ser Phe He His Arg Arg Leu Arg Ser 35 40 45 Gin Glu Arg Arg Glu Met Gin Arg Glu He Leu Ser He Leu Gly Leu 50 55 60 Pro His Arg Pro Arg Pro His Leu Gin Gly Lys His Asn Ser Ala Pro 65 70 75 80 Met Phe Met Leu Asp Leu Tyr Asn Ala Met Ala Val Glu Glu Ser Gly 85 90 95 Pro Asp Gly Gin Gly Phe Ser Tyr Pro Tyr Lys Ala Val Phe Ser Thr 100 105 110 Gin Gly Pro Pro Leu Ala Ser Leu Gin Asp Ser His Phe Leu Thr Asp 115 120 125 Ala Asp Met Val Met Ser Phe Val Asn Leu Val Glu His Asp Lys Glu 130 135 140 Phe Phe His Pro Arg Tyr His His Arg Glu Phe Arg Phe Asp Leu Ser 145 150 155 160 Lys He Pro Glu Gly Glu Arg Val Thr Ala Ala Glu Phe Arg He Tyr 165 170 175 Lys Asp Tyr He Arg Glu Arg Phe Asp Asn Glu Thr Phe Gin He Thr 180 185 190 Val Tyr Gin Val Leu Gin Glu His Ser Gly Arg Glu Ser Asp Leu Phe 195 200 205 Leu Leu Asp Ser Arg Thr He Trp Ala Ser Glu Glu Gly Trp Leu Val 210 215 220 Phe Asp He Thr Ala Thr Ser Asn His Trp Val Val Asn Pro Arg His 225 230 235 240 Asn Leu Gly Leu Gin Leu Ser Val Glu Thr Leu Asp Gly Gin Ser He 245 250 255 Asn Pro Lys Leu Ala Gly Leu He Gly Arg His Gly Pro Gin Asn Lys 260 265 270 Gin Pro Phe Met Val Ala Phe Phe Lys Ala Thr Glu Val His Leu Arg 275 280 285 Ser He Arg Ser Thr Gly Gly Lys Gin Arg Ser Gin Asn Arg Ser Lys 290 295 300 Thr Pro Lys Asn Gin Glu Ala Leu Arg Met Ala Ser Val Ala Glu Asn 305 310 315 320 Ser Ser Ser Asp Gin Arg Gin Ala Cys Lys Lys His Glu Leu Tyr Val 325 330 335 Ser Phe Arg Asp Leu Gly Trp Gin Asp Trp He He Ala Pro Glu Gly 340 345 350 Tyr Ala Ala Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asn Ser 355 360 365 Tyr Met Asn Ala Thr Asn His Ala He Val Gin Thr Leu Val His Phe 370 375 380 He Asn Pro Asp Thr Val Pro Lys Pro Cys Cys Ala Pro Thr Gin Leu 385 390 395 400 Asn Ala He Ser Val Leu Tyr Phe Asp Asp Ser Ser Asn Val Asp Leu 405 410 415 Lys Lys Tyr Arg Asn Met Val Val Arg Ala Cys Gly Cys His 420 425 430 (2) INFORMATION FOR SEQ ID NO:20: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1723 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (vi) ORIGINAL SOURCE: (A) ORGANISM: Homo sapiens (F) TISSUE TYPE: HIPPOCAMPUS (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 490..1696 (D) OTHER INFORMATION: /function= "OSTEOGENIC PROTEIN" /product= "hOP2-PP" /note= "hOP2 (cDNA)" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:20: GGCGCCGGCA GAGCAGGAGT GGCTGGAGGA GCTGTGGTTG GAGCAGGAGG TGGCACGGCA 60 GGGCTGGAGG GCTCCCTATG AGTGGCGGAG ACGGCCCAGG AGGCGCTGGA GCAACAGCTC 120 CCACACCGCA CCAAGCGGTG GCTGCAGGAG CTCGCCCATC GCCCCTGCGC TGCTCGGACC 180 GCGGCCACAG CCGGACTGGC GGGTACGGCG GCGACAGAGG CATTGGCCGA GAGTCCCAGT 240 CCGCAGAGTA GCCCCGGCCT CGAGGCGGTG GCGTCCCGGT CCTCTCCGTC CAGGAGCCAG 300 GACAGGTGTC GCGCGGCGGG GCTCCAGGGA CCGCGCCTGA GGCCGGCTGC CCGCCCGTCC 360 CGCCCCGCCC CGCCGCCCGC CGCCCGCCGA GCCCAGCCTC CTTGCCGTCG GGGCGTCCCC 420 AGGCCCTGGG TCGGCCGCGG AGCCGATGCG CGCCCGCTGA GCGCCCCAGC TGAGCGCCCC 480 CGGCCTGCC ATG ACC GCG CTC CCC GGC CCG CTC TGG CTC CTG GGC CTG 528 Met Thr Ala Leu Pro Gly Pro Leu Trp Leu Leu Gly Leu 1 5 10 GCG CTA TGC GCG CTG GGC GGG GGC GGC CCC GGC CTG CGA CCC CCG CCC 576 Ala Leu Cys Ala Leu Gly Gly Gly Gly Pro Gly Leu Arg Pro Pro Pro 15 20 25 GGC TGT CCC CAG CGA CGT CTG GGC GCG CGC GAG CGC CGG GAC GTG CAG 624 Gly Cys Pro Gin Arg Arg Leu Gly Ala Arg Glu Arg Arg Asp Val Gin 30 35 40 45 CGC GAG ATC CTG GCG GTG CTC GGG CTG CCT GGG CGG CCC CGG CCC CGC 672 Arg Glu He Leu Ala Val Leu Gly Leu Pro Gly Arg Pro Arg Pro Arg 50 55 60 GCG CCA CCC GCC GCC TCC CGG CTG CCC GCG TCC GCG CCG CTC TTC ATG 720 Ala Pro Pro Ala Ala Ser Arg Leu Pro Ala Ser Ala Pro Leu Phe Met 65 70 75 CTG GAC CTG TAC CAC GCC ATG GCC GGC GAC GAC GAC GAG GAC GGC GCG 768 Leu Asp Leu Tyr His Ala Met Ala Gly Asp Asp Asp Glu Asp Gly Ala 80 85 90 CCC GCG GAG CGG CGC CTG GGC CGC GCC GAC CTG GTC ATG AGC TTC GTT 816 Pro Ala Glu Arg Arg Leu Gly Arg Ala Asp Leu Val Met Ser Phe Val 95 100 105 AAC ATG GTG GAG CGA GAC CGT GCC CTG GGC CAC CAG GAG CCC CAT TGG 864 Asn Met Val Glu Arg Asp Arg Ala Leu Gly His Gin Glu Pro His Trp 110 115 120 125 AAG GAG TTC CGC TTT GAC CTG ACC CAG ATC CCG GCT GGG GAG GCG GTC 912 Lys Glu Phe Arg Phe Asp Leu Thr Gin He Pro Ala Gly Glu Ala Val 130 135 140 ACA GCT GCG GAG TTC CGG ATT TAC AAG GTG CCC AGC ATC CAC CTG CTC 960 Thr Ala Ala Glu Phe Arg He Tyr Lys Val Pro Ser He His Leu Leu 145 150 155 AAC AGG ACC CTC CAC GTC AGC ATG TTC CAG GTG GTC CAG GAG CAG TCC 1008 Asn Arg Thr Leu His Val Ser Met Phe Gin Val Val Gin Glu Gin Ser 160 165 170 AAC AGG GAG TCT GAC TTG TTC TTT TTG GAT CTT CAG ACG CTC CGA GCT 1056 Asn Arg Glu Ser Asp Leu Phe Phe Leu Asp Leu Gin Thr Leu Arg Ala 175 180 185 GGA GAC GAG GGC TGG CTG GTG CTG GAT GTC ACA GCA GCC AGT GAC TGC 1104 Gly Asp Glu Gly Trp Leu Val Leu Asp Val Thr Ala Ala Ser Asp Cys 190 195 200 205 TGG TTG CTG AAG CGT CAC AAG GAC CTG GGA CTC CGC CTC TAT GTG GAG 1152 Trp Leu Leu Lys Arg His Lys Asp Leu Gly Leu Arg Leu Tyr Val Glu 210 215 220 ACT GAG GAC GGG CAC AGC GTG GAT CCT GGC CTG GCC GGC CTG CTG GGT 1200 Thr Glu Asp Gly His Ser Val Asp Pro Gly Leu Ala Gly Leu Leu Gly 225 230 235 CAA CGG GCC CCA CGC TCC CAA CAG CCT TTC GTG GTC ACT TTC TTC AGG 1248 Gin Arg Ala Pro Arg Ser Gin Gin Pro Phe Val Val Thr Phe Phe Arg 240 245 250 GCC AGT CCG AGT CCC ATC CGC ACC CCT CGG GCA GTG AGG CCA CTG AGG 1296 Ala Ser Pro Ser Pro He Arg Thr Pro Arg Ala Val Arg Pro Leu Arg 255 260 265 AGG AGG CAG CCG AAG AAA AGC AAC GAG CTG CCG CAG GCC AAC CGA CTC 1344 Arg Arg Gin Pro Lys Lys Ser Asn Glu Leu Pro Gin Ala Asn Arg Leu 270 275 280 285 CCA GGG ATC TTT GAT GAC GTC CAC GGC TCC CAC GGC CGG CAG GTC TGC 1392 Pro Gly He Phe Asp Asp Val His Gly Ser His Gly Arg Gin Val Cys 290 295 300 CGT CGG CAC GAG CTC TAC GTC AGC TTC CAG GAC CTC GGC TGG CTG GAC 144 Arg Arg His Glu Leu Tyr Val Ser Phe Gin Asp Leu Gly Trp Leu Asp 305 310 315 TGG GTC ATC GCT CCC CAA GGC TAC TCG GCC TAT TAC TGT GAG GGG GAG 148 Trp Val He Ala Pro Gin Gly Tyr Ser Ala Tyr Tyr Cys Glu Gly Glu 320 325 330 TGC TCC TTC CCA CTG GAC TCC TGC ATG AAT GCC ACC AAC CAC GCC ATC 153 Cys Ser Phe Pro Leu Asp Ser Cys Met Asn Ala Thr Asn His Ala He 335 340 345 CTG CAG TCC CTG GTG CAC CTG ATG AAG CCA AAC GCA GTC CCC AAG GCG 1584 Leu Gin Ser Leu Val His Leu Met Lys Pro Asn Ala Val Pro Lys Ala 350 355 360 365 TGC TGT GCA CCC ACC AAG CTG AGC GCC ACC TCT GTG CTC TAC TAT GAC 1632 Cys Cys Ala Pro Thr Lys Leu Ser Ala Thr Ser Val Leu Tyr Tyr Asp 370 375 380 AGC AGC AAC AAC GTC ATC CTG CGC AAA GCC CGC AAC ATG GTG GTC AAG 1680 Ser Ser Asn Asn Val He Leu Arg Lys Ala Arg Asn Met Val Val Lys 385 390 395 GCC TGC GGC TGC CAC T GAGTCAGCCC GCCCAGCCCT ACTGCAG 1723 Ala Cys Gly Cys His 400 (2) INFORMATION FOR SEQ ID NO:21: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 402 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:21: Met Thr Ala Leu Pro Gly Pro Leu Trp Leu Leu Gly Leu Ala Leu Cys 1 5 10 15 Ala Leu Gly Gly Gly Gly Pro Gly Leu Arg Pro Pro Pro Gly Cys Pro 20 25 30 Gin Arg Arg Leu Gly Ala Arg Glu Arg Arg Asp Val Gin Arg Glu He 35 40 45 Leu Ala Val Leu Gly Leu Pro Gly Arg Pro Arg Pro Arg Ala Pro Pro 50 55 60 Ala Ala Ser Arg Leu Pro Ala Ser Ala Pro Leu Phe Met Leu Asp Leu 65 70 75 80 Tyr His Ala Met Ala Gly Asp Asp Asp Glu Asp Gly Ala Pro Ala Glu 85 90 95 Arg Arg Leu Gly Arg Ala Asp Leu Val Met Ser Phe Val Asn Met Val 100 105 110 Glu Arg Asp Arg Ala Leu Gly His Gin Glu Pro His Trp Lys Glu Phe 115 120 125 Arg Phe Asp Leu Thr Gin He Pro Ala Gly Glu Ala Val Thr Ala Ala 130 135 140 Glu Phe Arg He Tyr Lys Val Pro Ser He His Leu Leu Asn Arg Thr 145 150 155 160 Leu His Val Ser Met Phe Gin Val Val Gin Glu Gin Ser Asn Arg Glu 165 170 175 Ser Asp Leu Phe Phe Leu Asp Leu Gin Thr Leu Arg Ala Gly Asp Glu 180 185 190 Gly Trp Leu Val Leu Asp Val Thr Ala Ala Ser Asp Cys Trp Leu Leu 195 200 205 Lys Arg His Lys Asp Leu Gly Leu Arg Leu Tyr Val Glu Thr Glu Asp 210 215 220 Gly His Ser Val Asp Pro Gly Leu Ala Gly Leu Leu Gly Gin Arg Ala 225 230 235 240 Pro Arg Ser Gin Gin Pro Phe Val Val Thr Phe Phe Arg Ala Ser Pro 245 250 255 Ser Pro He Arg Thr Pro Arg Ala Val Arg Pro Leu Arg Arg Arg Gin 260 265 270 Pro Lys Lys Ser Asn Glu Leu Pro Gin Ala Asn Arg Leu Pro Gly He 275 280 285 Phe Asp Asp Val His Gly Ser His Gly Arg Gin Val Cys Arg Arg His 290 295 300 Glu Leu Tyr Val Ser Phe Gin Asp Leu Gly Trp Leu Asp Trp Val He 305 310 315 320 Ala Pro Gin Gly Tyr Ser Ala Tyr Tyr Cys Glu Gly Glu Cys Ser Phe 325 330 335 Pro Leu Asp Ser Cys Met Asn Ala Thr Asn His Ala He Leu Gin Ser 340 345 350 Leu Val His Leu Met Lys Pro Asn Ala Val Pro Lys Ala Cys Cys Ala 355 360 365 Pro Thr Lys Leu Ser Ala Thr Ser Val Leu Tyr Tyr Asp Ser Ser Asn 370 375 380 Asn Val He Leu Arg Lys Ala Arg.Asn Met Val Val Lys Ala Cys Gly 385 390 395 400 Cys His (2) INFORMATION FOR SEQ ID NO:22: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1926 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (vi) ORIGINAL SOURCE: (A) ORGANISM: MURIDAE (F) TISSUE TYPE: EMBRYO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 93..1289 (D) OTHER INFORMATION: /function= "OSTEOGENIC PROTEIN" /product= "mOP2-PP" /note= "m0P2 cDNA" (xi) SEQUENCE DESCRIPTION: SEQ ID N0:22: GCCAGGCACA GGTGCGCCGT CTGGTCCTCC CCGTCTGGCG TCAGCCGAGC CCGACCAGCT 60 ACCAGTGGAT GCGCGCCGGC TGAAAGTCCG AG ATG GCT ATG CGT CCC GGG CCA 113 Met Ala Met Arg Pro Gly Pro 1 5 CTC TGG CTA TTG GGC CTT GCT CTG TGC GCG CTG GGA GGC GGC CAC GGT 161 Leu Trp Leu Leu Gly Leu Ala Leu Cys Ala Leu Gly Gly Gly His Gly 10 15 20 CCG CGT CCC CCG CAC ACC TGT CCC CAG CGT CGC CTG GGA GCG CGC GAG 209 Pro Arg Pro Pro His Thr Cys Pro Gin Arg Arg Leu Gly Ala Arg Glu 25 30 35 CGC CGC GAC ATG CAG CGT GAA ATC CTG GCG GTG CTC GGG CTA CCG GGA 257 Arg Arg Asp Met Gin Arg Glu He Leu Ala Val Leu Gly Leu Pro Gly 40 45 50 55 CGG CCC CGA CCC CGT GCA CAA CCC GCC GCT GCC CGG CAG CCA GCG TCC 305 Arg Pro Arg Pro Arg Ala Gin Pro Ala Ala Ala Arg Gin Pro Ala Ser 60 65 70 GCG CCC CTC TTC ATG TTG GAC CTA TAC CAC GCC ATG ACC GAT GAC GAC 353 Ala Pro Leu Phe Met Leu Asp Leu Tyr His Ala Met Thr Asp Asp Asp 75 80 85 GAC GGC GGG CCA CCA CAG GCT CAC TTA GGC CGT GCC GAC CTG GTC ATG 401 Asp Gly Gly Pro Pro Gin Ala His Leu Gly Arg Ala Asp Leu Val Met 90 95 100 AGC TTC GTC AAC ATG GTG GAA CGC GAC CGT ACC CTG GGC TAC CAG GAG 449 Ser Phe Val Asn Met Val Glu Arg Asp Arg Thr Leu Gly Tyr Gin Glu 105 110 115 CCA CAC TGG AAG GAA TTC CAC TTT GAC CTA ACC CAG ATC CCT GCT GGG 497 Pro His Trp Lys Glu Phe His Phe Asp Leu Thr Gin He Pro Ala Gly 120 125 130 135 GAG GCT GTC ACA GCT GCT GAG TTC CGG ATC TAC AAA GAA CCC AGC ACC 545 Glu Ala Val Thr Ala Ala Glu Phe Arg He Tyr Lys Glu Pro Ser Thr 140 145 150 CAC CCG CTC AAC ACA ACC CTC CAC ATC AGC ATG TTC GAA GTG GTC CAA 593 His Pro Leu Asn Thr Thr Leu His He Ser Met Phe Glu Val Val Gin 155 160 165 GAG CAC TCC AAC AGG GAG TCT GAC TTG TTC TTT TTG GAT CTT CAG ACG 641 Glu His Ser Asn Arg Glu Ser Asp Leu Phe Phe Leu Asp Leu Gin Thr 170 175 180 CTC CGA TCT GGG GAC GAG GGC TGG CTG GTG CTG GAC ATC ACA GCA GCC 689 Leu Arg Ser Gly Asp Glu Gly Trp Leu Val Leu Asp He Thr Ala Ala 185 190 195 AGT GAC CGA TGG CTG CTG AAC CAT CAC AAG GAC CTG GGA CTC CGC CTC 737 Ser Asp Arg Trp Leu Leu Asn His His Lys Asp Leu Gly Leu Arg Leu 200 205 210 215 TAT GTG GAA ACC GCG GAT GGG CAC AGC ATG GAT CCT GGC CTG GCT GGT 785 Tyr Val Glu Thr Ala Asp Gly His Ser Met Asp Pro Gly Leu Ala Gly 220 225 230 CTG CTT GGA CGA CAA GCA CCA CGC TCC AGA CAG CCT TTC ATG GTA ACC 833 Leu Leu Gly Arg Gin Ala Pro Arg Ser Arg Gin Pro Phe Met Val Thr 235 240 245 TTC TTC AGG GCC AGC CAG AGT CCT GTG CGG GCC CCT CGG GCA GCG AGA 881 Phe Phe Arg Ala Ser Gin Ser Pro Val Arg Ala Pro Arg Ala Ala Arg 250 255 260 CCA CTG AAG AGG AGG CAG CCA AAG AAA ACG AAC GAG CTT CCG CAC CCC 929 Pro Leu Lys Arg Arg Gin Pro Lys Lys Thr Asn Glu Leu Pro His Pro 265 270 275 AAC AAA CTC CCA GGG ATC TTT GAT GAT GGC CAC GGT TCC CGC GGC AGA 977 Asn Lys Leu Pro Gly He Phe Asp Asp Gly His Gly Ser Arg Gly Arg 280 285 290 295 GAG GTT TGC CGC AGG CAT GAG CTC TAC GTC AGC TTC CGT GAC CTT GGC 1025 Glu Val Cys Arg Arg His Glu Leu Tyr Val Ser Phe Arg Asp Leu Gly 300 305 310 TGG CTG GAC TGG GTC ATC GCC CCC CAG GGC TAC TCT GCC TAT TAC TGT 1073 Trp Leu Asp Trp Val He Ala Pro Gin Gly Tyr Ser Ala Tyr Tyr Cys 315 320 325 GAG GGG GAG TGT GCT TTC CCA CTG GAC TCC TGT ATG AAC GCC ACC AAC 1121 Glu Gly Glu Cys Ala Phe Pro Leu Asp Ser Cys Met Asn Ala Thr Asn 330 335 340 CAT GCC ATC TTG CAG TCT CTG GTG CAC CTG ATG AAG CCA GAT GTT GTC 1169 His Ala He Leu Gin Ser Leu Val His Leu Met Lys Pro Asp Val Val 345 350 355 CCC AAG GCA TGC TGT GCA CCC ACC AAA CTG AGT GCC ACC TCT GTG CTG 1217 Pro Lys Ala Cys Cys Ala Pro Thr Lys Leu Ser Ala Thr Ser Val Leu 360 365 370 375 TAC TAT GAC AGC AGC AAC AAT GTC ATC CTG CGT AAA CAC CGT AAC ATG 1265 Tyr Tyr Asp Ser Ser Asn Asn Val He Leu Arg Lys His Arg Asn Met 380 385 390 GTG GTC AAG GCC TGT GGC TGC CAC TGAGGCCCCG CCCAGCATCC TGCTTCTACT 1319 Val Val Lys Ala Cys Gly Cys His 395 ACCTTACCAT CTGGCCGGGC CCCTCTCCAG AGGCAGAAAC CCTTCTATGT TATCATAGCT 1379 CAGACAGGGG CAATGGGAGG CCCTTCACTT CCCCTGGCCA CTTCCTGCTA AAATTCTGGT 1439 CTTTCCCAGT TCCTCTGTCC TTCATGGGGT TTCGGGGCTA TCACCCCGCC CTCTCCATCC 1499 TCCTACCCCA AGCATAGACT GAATGCACAC AGCATCCCAG AGCTATGCTA ACTGAGAGGT 1559 CTGGGGTCAG CACTGAAGGC CCACATGAGG AAGACTGATC CTTGGCCATC CTCAGCCCAC 1619 AATGGCAAAT TCTGGATGGT CTAAGAAGGC CCTGGAATTC TAAACTAGAT GATCTGGGCT 1679 CTCTGCACCA TTCATTGTGG CAGTTGGGAC ATTTTTAGGT ATAACAGACA CATACACTTA 1739 GATCAATGCA TCGCTGTACT CCTTGAAATC AGAGCTAGCT TGTTAGAAAA AGAATCAGAG 1799 CCAGGTATAG CGGTGCATGT CATTAATCCC AGCGCTAAAG AGACAGAGAC AGGAGAATCT 1859 CTGTGAGTTC AAGGCCACAT AGAAAGAGCC TGTCTCGGGA GCAGGAAAAA AAAAAAAAAC 1919 GGAATTC 1926 (2) INFORMATION FOR SEQ ID NO:23: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 399 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID N0:23: Met Ala Met Arg Pro Gly Pro Leu Trp Leu Leu Gly Leu Ala Leu Cys 1 5 10 15 Ala Leu Gly Gly Gly His Gly Pro Arg Pro Pro His Thr Cys Pro Gin 20 25 30 Arg Arg Leu Gly Ala Arg Glu Arg Arg Asp Met Gin Arg Glu He Leu 35 40 45 Ala Val Leu Gly Leu Pro Gly Arg Pro Arg Pro Arg Ala Gin Pro Ala 50 55 60 Ala Ala Arg Gin Pro Ala Ser Ala Pro Leu Phe Met Leu Asp Leu Tyr 65 70 75 80 His Ala Met Thr Asp Asp Asp Asp Gly Gly Pro Pro Gin Ala His Leu 85 90 95 Gly Arg Ala Asp Leu Val Met Ser Phe Val Asn Met Val Glu Arg Asp 100 105 110 Arg Thr Leu Gly Tyr Gin Glu Pro His Trp Lys Glu Phe His Phe Asp 115 120 125 Leu Thr Gin He Pro Ala Gly Glu Ala Val Thr Ala Ala Glu Phe Arg 130 135 140 He Tyr Lys Glu Pro Ser Thr His Pro Leu Asn Thr Thr Leu His He 145 150 155 160 Ser Met Phe Glu Val Val Gin Glu His Ser Asn Arg Glu Ser Asp Leu 165 170 175 Phe Phe Leu Asp Leu Gin Thr Leu Arg Ser Gly Asp Glu Gly Trp Leu 180 185 190 Val Leu Asp He Thr Ala Ala Ser Asp Arg Trp Leu Leu Asn His His 195 200 205 Lys Asp Leu Gly Leu Arg Leu Tyr Val Glu Thr Ala Asp Gly His Ser 210 215 220 Met Asp Pro Gly Leu Ala Gly Leu Leu Gly Arg Gin Ala Pro Arg Ser 225 230 235 240 Arg Gin Pro Phe Met Val Thr Phe Phe Arg Ala Ser Gin Ser Pro Val 245 250 255 Arg Ala Pro Arg Ala Ala Arg Pro Leu Lys Arg Arg Gin Pro Lys Lys 260 265 270 Thr Asn Glu Leu Pro His Pro Asn Lys Leu Pro Gly He Phe Asp Asp 275 280 285 Gly His Gly Ser Arg Gly Arg Glu Val Cys Arg Arg His Glu Leu Tyr 290 295 300 Val Ser Phe Arg Asp Leu Gly Trp Leu Asp Trp Val He Ala Pro Gin 305 310 315 320 Gly Tyr Ser Ala Tyr Tyr Cys Glu Gly Glu Cys Ala Phe Pro Leu Asp 325 330 335 Ser Cys Met Asn Ala Thr Asn His Ala He Leu Gin Ser Leu Val His 340 345 350 Leu Met Lys Pro Asp Val Val Pro Lys Ala Cys Cys Ala Pro Thr Lys 355 360 365 Leu Ser Ala Thr Ser Val Leu Tyr Tyr Asp Ser Ser Asn Asn Val He 370 375 380 Leu Arg Lys His Arg Asn Met Val Val Lys Ala Cys Gly Cys His 385 390 395 (2) INFORMATION FOR SEQ ID N0:24: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1368 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 1..1368 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:24: ATG TCG GGA CTG CGA AAC ACC TCG GAG GCC GTT GCA GTG CTC GCC TCC 48 Met Ser Gly Leu Arg Asn Thr Ser Glu Ala Val Ala Val Leu Ala Ser 1 5 10 15 CTG GGA CTC GGA ATG GTT CTG CTC ATG TTC GTG GCG ACC ACG CCG CCG 96 Leu Gly Leu Gly Met Val Leu Leu Met Phe Val Ala Thr Thr Pro Pro 20 25 30 GCC GTT GAG GCC ACC CAG TCG GGG ATT TAC ATA GAC AAC GGC AAG GAC 144 Ala Val Glu Ala Thr Gin Ser Gly He Tyr He Asp Asn Gly Lys Asp 35 40 45 CAG ACG ATC ATG CAC AGA GTG CTG AGC GAG GAC GAC AAG CTG GAC GTC 192 Gin Thr He Met His Arg Val Leu Ser Glu Asp Asp Lys Leu Asp Val 50 55 60 TCG TAC GAG ATC CTC GAG TTC CTG GGC ATC GCC GAA CGG CCG ACG CAC 240 Ser Tyr Glu He Leu Glu Phe Leu Gly He Ala Glu Arg Pro Thr His 65 70 75 80 CTG AGC AGC CAC CAG TTG TCG CTG AGG AAG TCG GCT CCC AAG TTC CTG 288 Leu Ser Ser His Gin Leu Ser Leu Arg Lys Ser Ala Pro Lys Phe Leu 85 90 95 CTG GAC GTC TAC CAC CGC ATC ACG GCG GAG GAG GGT CTC AGC GAT CAG 336 Leu Asp Val Tyr His Arg He Thr Ala Glu Glu Gly Leu Ser Asp Gin 100 105 110 GAT GAG GAC GAC GAC TAC GAA CGC GGC CAT CGG TCC AGG AGG AGC GCC 384 Asp Glu Asp Asp Asp Tyr Glu Arg Gly His Arg Ser Arg Arg Ser Ala 115 120 125 GAC CTC GAG GAG GAT GAG GGC GAG CAG CAG AAG AAC TTC ATC ACC GAC 432 Asp Leu Glu Glu Asp Glu Gly Glu Gin Gin Lys Asn Phe He Thr Asp 130 135 140 CTG GAC AAG CGG GCC ATC GAC GAG AGC GAC ATC ATC ATG ACC TTC CTG 480 Leu Asp Lys Arg Ala He Asp Glu Ser Asp He He Met Thr Phe Leu 145 150 155 160 AAC AAG CGC CAC CAC AAT GTG GAC GAA CTG CGT CAC GAG CAC GGC CGT 528 Asn Lys Arg His His Asn Val Asp Glu Leu Arg His Glu His Gly Arg 165 170 175 CGC CTG TGG TTC GAC GTC TCC AAC GTG CCC AAC GAC AAC TAC CTG GTG 576 Arg Leu Trp Phe Asp Val Ser Asn Val Pro Asn Asp Asn Tyr Leu Val 180 185 190 ATG GCC GAG CTG CGC ATC TAT CAG AAC GCC AAC GAG GGC AAG TGG CTG 624 Met Ala Glu Leu Arg He Tyr Gin Asn Ala Asn Glu Gly Lys Trp Leu 195 200 205 ACC GCC AAC AGG GAG TTC ACC ATC ACG GTA TAC GCC ATT GGC ACC GGC 672 Thr Ala Asn Arg Glu Phe Thr He Thr Val Tyr Ala He Gly Thr Gly 210 215 220 ACG CTG GGC CAG CAC ACC ATG GAG CCG CTG TCC TCG GTG AAC ACC ACC 720 Thr Leu Gly Gin His Thr Met Glu Pro Leu Ser Ser Val Asn Thr Thr 225 230 235 240 GGG GAC TAC GTG GGC TGG TTG GAG CTC AAC GTG ACC GAG GGC CTG CAC 768 Gly Asp Tyr Val Gly Trp Leu Glu Leu Asn Val Thr Glu Gly Leu His 245 250 255 GAG TGG CTG GTC AAG TCG AAG GAC AAT CAT GGC ATC TAC ATT GGA GCA 816 Glu Trp Leu Val Lys Ser Lys Asp Asn His Gly He Tyr He Gly Ala 260 265 270 CAC GCT GTC AAC CGA CCC GAC CGC GAG GTG AAG CTG GAC GAC ATT GGA 864 His Ala Val Asn Arg Pro Asp Arg Glu Val Lys Leu Asp Asp He Gly 275 280 285 CTG ATC CAC CGC AAG GTG GAC GAC GAG TTC CAG CCC TTC ATG ATC GGC 912 Leu He His Arg Lys Val Asp Asp Glu Phe Gin Pro Phe Met He Gly 290 295 300 TTC TTC CGC GGA CCG GAG CTG ATC AAG GCG ACG GCC CAC AGC AGC CAC 960 Phe Phe Arg Gly Pro Glu Leu He Lys Ala Thr Ala His Ser Ser His 305 310 315 320 CAC AGG AGC AAG CGA AGC GCC AGC CAT CCA CGC AAG CGC AAG AAG TCG 1008 His Arg Ser Lys Arg Ser Ala Ser His Pro Arg Lys Arg Lys Lys Ser 325 330 335 GTG TCG CCC AAC AAC GTG CCG CTG CTG GAA CCG ATG GAG AGC ACG CGC 1056 Val Ser Pro Asn Asn Val Pro Leu Leu Glu Pro Met Glu Ser Thr Arg 340 345 350 AGC TGC CAG ATG CAG ACC CTG TAC ATA GAC TTC AAG GAT CTG GGC TGG 1104 Ser Cys Gin Met Gin Thr Leu Tyr He Asp Phe Lys Asp Leu Gly Trp 355 360 365 CAT GAC TGG ATC ATC GCA CCA GAG GGC TAT GGC GCC TTC TAC TGC AGC 1152 His Asp Trp He He Ala Pro Glu Gly Tyr Gly Ala Phe Tyr Cys Ser 370 375 380 GGC GAG TGC AAT TTC CCG CTC AAT GCG CAC ATG AAC GCC ACG AAC CAT 1200 Gly Glu Cys Asn Phe Pro Leu Asn Ala His Met Asn Ala Thr Asn His 385 390 395 400 GCG ATC GTC CAG ACC CTG GTC CAC CTG CTG GAG CCC AAG AAG GTG CCC 1248 Ala He Val Gin Thr Leu Val His Leu Leu Glu Pro Lys Lys Val Pro 405 410 415 AAG CCC TGC TGC GCT CCG ACC AGG CTG GGA GCA CTA CCC GTT CTG TAC 1296 Lys Pro Cys Cys Ala Pro Thr Arg Leu Gly Ala Leu Pro Val Leu Tyr 420 425 430 CAC CTG AAC GAC GAG AAT GTG AAC CTG AAA AAG TAT AGA AAC ATG ATT 1344 His Leu Asn Asp Glu Asn Val Asn Leu Lys Lys Tyr Arg Asn Met He 435 440 445 GTG AAA TCC TGC GGG TGC CAT TGA 1368 Val Lys Ser Cys Gly Cys His 450 455 (2) INFORMATION FOR SEQ ID NO:25: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 455 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:25: Met Ser Gly Leu Arg Asn Thr Ser Glu Ala Val Ala Val Leu Ala Ser 1 5 10 15 Leu Gly Leu Gly Met Val Leu Leu Met Phe Val Ala Thr Thr Pro Pro 20 25 30 Ala Val Glu Ala Thr Gin Ser Gly He Tyr He Asp Asn Gly Lys Asp 35 40 45 Gin Thr He Met His Arg Val Leu Ser Glu Asp Asp Lys Leu Asp Val 50 55 60 Ser Tyr Glu He Leu Glu Phe Leu Gly He Ala Glu Arg Pro Thr His 65 70 75 80 Leu Ser Ser His Gin Leu Ser Leu Arg Lys Ser Ala Pro Lys Phe Leu 85 90 95 Leu Asp Val Tyr His Arg He Thr Ala Glu Glu Gly Leu Ser Asp Gin 100 105 110 sp Glu Asp Asp Asp Tyr Glu Arg Gly His Arg Ser Arg Arg Ser Ala 115 120 125 Asp Leu Glu Glu Asp Glu Gly Glu Gin Gin Lys Asn Phe He Thr Asp 130 135 140 Leu Asp Lys Arg Ala He Asp Glu Ser Asp He He Met Thr Phe Leu 145 150 155 160 Asn Lys Arg His His Asn Val Asp Glu Leu Arg His Glu His Gly Arg 165 170 175 Arg Leu Trp Phe Asp Val Ser Asn Val Pro Asn Asp Asn Tyr Leu Val 180 185 190 Met Ala Glu Leu Arg He Tyr Gin Asn Ala Asn Glu Gly Lys Trp Leu 195 200 205 Thr Ala Asn Arg Glu Phe Thr He Thr Val Tyr Ala He Gly Thr Gly 210 215 220 Thr Leu Gly Gin His Thr Met Glu Pro Leu Ser Ser Val Asn Thr Thr 225 230 235 240 Gly Asp Tyr Val Gly Trp Leu Glu Leu Asn Val Thr Glu Gly Leu His 245 250 255 Glu Trp Leu Val Lys Ser Lys Asp Asn His Gly He Tyr He Gly Ala 260 265 270 His Ala Val Asn Arg Pro Asp Arg Glu Val Lys Leu Asp Asp He Gly 275 280 285 Leu He His Arg Lys Val Asp Asp Glu Phe Gin Pro Phe Met He Gly 290 295 300 Phe Phe Arg Gly Pro Glu Leu He Lys Ala Thr Ala His Ser Ser His 305 310 315 320 His Arg Ser Lys Arg Ser Ala Ser His Pro Arg Lys Arg Lys Lys Ser 325 330 335 Val Ser Pro Asn Asn Val Pro Leu Leu Glu Pro Met Glu Ser Thr Arg 340 345 350 Ser Cys Gin Met Gin Thr Leu Tyr He Asp Phe Lys Asp Leu Gly Trp 355 360 365 His Asp Trp He He Ala Pro Glu Gly Tyr Gly Ala Phe Tyr Cys Ser 370 375 380 Gly Glu Cys Asn Phe Pro Leu Asn Ala His Met Asn Ala Thr Asn His 385 390 395 400 Ala He Val Gin Thr Leu Val His Leu Leu Glu Pro Lys Lys Val Pro 405 410 415 Lys Pro Cys Cys Ala Pro Thr Arg Leu Gly Ala Leu Pro Val Leu Tyr 420 425 430 His Leu Asn Asp Glu Asn Val Asn Leu Lys Lys Tyr Arg Asn Met He 435 440 445 Val Lys Ser Cys Gly Cys His 450 455 (2) INFORMATION FOR SEQ ID NO:26: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 104 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..104 (D) OTHER INFORMATION: /note= "BMP3" (xi) SEQUENCE DESCRIPTION: SEQ ID N0:26: Cys Ala Arg Arg Tyr Leu Lys Val Asp Phe Ala Asp He Gly Trp Ser 1 5 10 15 Glu Trp He He Ser Pro Lys Ser Phe Asp Ala Tyr Tyr Cys Ser Gly 20 25 30 Ala Cys Gin Phe Pro Met Pro Lys Ser Leu Lys Pro Ser Asn His Ala 35 40 45 Thr He Gin Ser He Val Ala Arg Ala Val Gly Val Val Pro Gly He 50 55 60 Pro Glu Pro Cys Cys Val Pro Glu Lys Met Ser Ser Leu Ser He Leu 65 70 75 80 Phe Phe Asp Glu Asn Lys Asn Val Val Leu Lys Val Tyr Pro Asn Met 85 90 95 Thr Val Glu Ser Cys Ala Cys Arg 100 (2) INFORMATION FOR SEQ ID NO:27: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /note= "BMP5" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:27: Cys Lys Lys His Glu Leu Tyr Val Ser Phe Arg Asp Leu Gly Trp Gin 1 5 10 15 Asp Trp He He Ala Pro Glu Gly Tyr Ala Ala Phe Tyr Cys Asp Gly 20 25 30 Glu Cys Ser Phe Pro Leu Asn Ala His Met Asn Ala Thr Asn His Ala 35 40 45 He Val Gin Thr Leu Val His Leu Met Phe Pro Asp His Val Pro Lys 50 55 60 Pro Cys Cys Ala Pro Thr Lys Leu Asn Ala He Ser Val Leu Tyr Phe 65 70 75 80 Asp Asp Ser Ser Asn Val He Leu Lys Lys Tyr Arg Asn Met Val Val 85 90 95 Arg Ser Cys Gly Cys His 100 (2) INFORMATION FOR SEQ ID NO:28: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS - I l l - (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /note= "BMP6" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:28: Cys Arg Lys His Glu Leu Tyr Val Ser Phe Gin Asp Leu Gly Trp Gin 1 5 10 15 Asp Trp He He Ala Pro Lys Gly Tyr Ala Ala Asn Tyr Cys Asp Gly 20 25 30 Glu Cys Ser Phe Pro Leu Asn Ala His Met Asn Ala Thr Asn His Ala 35 40 45 He Val Gin Thr Leu Val His Leu Met Asn Pro Glu Tyr Val Pro Lys 50 55 60 Pro Cys Cys Ala Pro Thr Lys Leu Asn Ala He Ser Val Leu Tyr Phe 65 70 75 80 Asp Asp Asn Ser Asn Val He Leu Lys Lys Tyr Arg Trp Met Val Val 85 90 95 Arg Ala Cys Gly Cys His 100 (2) INFORMATION FOR SEQ ID NO:29: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /label= OPX /note= "WHEREIN EACH XAA IS INDEPENDENTLY SELECTED FROM A GROUP OF ONE OR MORE SPECIFIED AMINO ACIDS AS DEFINED IN THE SPECIFICATION (SECTION II.B.2.)" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:29: Cys Xaa Xaa His Glu Leu Tyr Val Xaa Phe Xaa Asp Leu Gly Trp Xaa 1 5 10 15 Asp Trp Xaa He Ala Pro Xaa Gly Tyr Xaa Ala Tyr Tyr Cys Glu Gly 20 25 30 Glu Cys Xaa Phe Pro Leu Xaa Ser Xaa Met Asn Ala Thr Asn His Ala 35 40 45 He Xaa Gin Xaa Leu Val His Xaa Xaa Xaa Pro Xaa Xaa Val Pro Lys 50 55 60 Xaa Cys Cys Ala Pro Thr Xaa Leu Xaa Ala Xaa Ser Val Leu Tyr Xaa 65 70 75 80 Asp Xaa Ser Xaa Asn Val Xaa Leu Xaa Lys Xaa Arg Asn Met Val Val 85 90 95 Xaa Ala Cys Gly Cys His 100 (2) INFORMATION FOR SEQ ID NO:30: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 97 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..97 (D) OTHER INFORMATION: /label= GENERIC-SEQ5 /note= "WHEREIN EACH XAA IS INDEPENDENTLY SELECTED FROM A GROUP OF ONE OR MORE SPECIFIED AMINO ACIDS AS DEFINED IN THE SPECIFICATION." (xi) SEQUENCE DESCRIPTION: SEQ ID NO:30: Leu Xaa Xaa Xaa Phe Xaa Xaa Xaa Gly Trp Xaa Xaa Trp Xaa Xaa Xaa 1 5 10 15 Pro Xaa Xaa Xaa Xaa Ala Xaa Tyr Cys Xaa Gly Xaa Cys Xaa Xaa Pro 20 25 30 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Asn His Ala Xaa Xaa Xaa Xaa Xaa 35 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Cys Cys Xaa Pro 50 55 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Leu Xaa Xaa Xaa Xaa Xaa Xaa Xaa 65 70 75 80 Val Xaa Leu Xaa Xaa Xaa Xaa Xaa Met Xaa Val Xaa Xaa Cys Xaa Cys 85 90 95 Xaa (2) INFORMATION FOR SEQ ID NO:31: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 102 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (ix) FEATURE: (A) NAME/KEY: Protein (B) LOCATION: 1..102 (D) OTHER INFORMATION: /label= GENERIC-SEQ6 /note= "WHEREIN EACH XAA IS INDEPENDENTLY SELECTED FROM A GROUP OF ONE OR MORE SPECIFIED AMINO ACIDS AS DEFINED IN THE SPECIFICATION. " (xi) SEQUENCE DESCRIPTION: SEQ ID N0:31: Cys Xaa Xaa Xaa Xaa Leu Xaa Xaa Xaa Phe Xaa Xaa Xaa Gly Trp Xaa 1 5 10 15 Xaa Trp Xaa Xaa Xaa Pro Xaa Xaa Xaa Xaa Ala Xaa Tyr Cys Xaa Gly 20 25 30 Xaa Cys Xaa Xaa Pro Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Asn His Ala 35 40 45 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa 50 55 60 Xaa Cys Cys Xaa Pro Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Leu Xaa Xaa 65 70 75 80 Xaa Xaa Xaa Xaa Xaa Val Xaa Leu Xaa Xaa Xaa Xaa Xaa Met Xaa Val 85 90 95 Xaa Xaa Cys Xaa Cys Xaa 100 (2) INFORMATION FOR SEQ ID NO:32: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1247 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (vi) ORIGINAL SOURCE: (A) ORGANISM: HOMO SAPIENS (F) TISSUE TYPE: BRAIN (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 84..1199 (D) OTHER INFORMATION: /product= "GDF-1" /note= "GDF-1 CDNA" (xi) SEQUENCE DESCRIPTION: SEQ ID NO:32: GGGGACACCG GCCCCGCCCT CAGCCCACTG GTCCCGGGCC GCCGCGGACC CTGCGCACTC 60 TCTGGTCATC GCCTGGGAGG AAG ATG CCA CCG CCG CAG CAA GGT CCC TGC 110 Met Pro Pro Pro Gin Gin Gly Pro Cys 1 5 GGC CAC CAC CTC CTC CTC CTC CTG GCC CTG CTG CTG CCC TCG CTG CCC 158 Gly His His Leu Leu Leu Leu Leu Ala Leu Leu Leu Pro Ser Leu Pro 10 15 20 25 CTG ACC CGC GCC CCC GTG CCC CCA GGC CCA GCC GCC GCC CTG CTC CAG 206 Leu Thr Arg Ala Pro Val Pro Pro Gly Pro Ala Ala Ala Leu Leu Gin 30 35 40 GCT CTA GGA CTG CGC GAT GAG CCC CAG GGT GCC CCC AGG CTC CGG CCG 254 Ala Leu Gly Leu Arg Asp Glu Pro Gin Gly Ala Pro Arg Leu Arg Pro 45 50 55 GTT CCC CCG GTC ATG TGG CGC CTG TTT CGA CGC CGG GAC CCC CAG GAG 302 Val Pro Pro Val Met Trp Arg Leu Phe Arg Arg Arg Asp Pro Gin Glu 60 65 70 ACC AGG TCT GGC TCG CGG CGG ACG TCC CCA GGG GTC ACC CTG CAA CCG 350 Thr Arg Ser Gly Ser Arg Arg Thr Ser Pro Gly Val Thr Leu Gin Pro 75 80 85 TGC CAC GTG GAG GAG CTG GGG GTC GCC GGA AAC ATC GTG CGC CAC ATC 398 Cys His Val Glu Glu Leu Gly Val Ala Gly Asn He Val Arg His He 90 95 100 105 CCG GAC CGC GGT GCG CCC ACC CGG GCC TCG GAG CCT GTC TCG GCC GCG 44 Pro Asp Arg Gly Ala Pro Thr Arg Ala Ser Glu Pro Val Ser Ala Ala 110 115 120 GGG CAT TGC CCT GAG TGG ACA GTC GTC TTC GAC CTG TCG GCT GTG GAA 49 Gly His Cys Pro Glu Trp Thr Val Val Phe Asp Leu Ser Ala Val Glu 125 130 135 CCC GCT GAG CGC CCG AGC CGG GCC CGC CTG GAG CTG CGT TTC GCG GCG 542 Pro Ala Glu Arg Pro Ser Arg Ala Arg Leu Glu Leu Arg Phe Ala Ala 140 145 150 GCG GCG GCG GCA GCC CCG GAG GGC GGC TGG GAG CTG AGC GTG GCG CAA 590 Ala Ala Ala Ala Ala Pro Glu Gly Gly Trp Glu Leu Ser Val Ala Gin 155 160 165 GCG GGC CAG GGC GCG GGC GCG GAC CCC GGG CCG GTG CTG CTC CGC CAG 638 Ala Gly Gin Gly Ala Gly Ala Asp Pro Gly Pro Val Leu Leu Arg Gin 170 175 180 185 TTG GTG CCC GCC CTG GGG CCG CCA GTG CGC GCG GAG CTG CTG GGC GCC 686 Leu Val Pro Ala Leu Gly Pro Pro Val Arg Ala Glu Leu Leu Gly Ala 190 195 200 GCT TGG GCT CGC AAC GCC TCA TGG CCG CGC AGC CTC CGC CTG GCG CTG 734 Ala Trp Ala Arg Asn Ala Ser Trp Pro Arg Ser Leu Arg Leu Ala Leu 205 210 215 GCG CTA CGC CCC CGG GCC CCT GCC GCC TGC GCG CGC CTG GCC GAG GCC 782 Ala Leu Arg Pro Arg Ala Pro Ala Ala Cys Ala Arg Leu Ala Glu Ala 220 225 230 TCG CTG CTG CTG GTG ACC CTC GAC CCG CGC CTG TGC CAC CCC CTG GCC 830 Ser Leu Leu Leu Val Thr Leu Asp Pro Arg Leu Cys His Pro Leu Ala 235 240 245 CGG CCG CGG CGC GAC GCC GAA CCC GTG TTG GGC GGC GGC CCC GGG GGC 878 Arg Pro Arg Arg Asp Ala Glu Pro Val Leu Gly Gly Gly Pro Gly Gly 250 255 260 265 GCT TGT CGC GCG CGG CGG CTG TAC GTG AGC TTC CGC GAG GTG GGC TGG 926 Ala Cys Arg Ala Arg Arg Leu Tyr Val Ser Phe Arg Glu Val Gly Trp 270 275 280 CAC CGC TGG GTC ATC GCG CCG CGC GGC TTC CTG GCC AAC TAC TGC CAG 974 His Arg Trp Val He Ala Pro Arg Gly Phe Leu Ala Asn Tyr Cys Gin 285 290 295 GGT CAG TGC GCG CTG CCC GTC GCG CTG TCG GGG TCC GGG GGG CCG CCG 1022 Gly Gin Cys Ala Leu Pro Val Ala Leu Ser Gly Ser Gly Gly Pro Pro 300 305 310 GCG CTC AAC CAC GCT GTG CTG CGC GCG CTC ATG CAC GCG GCC GCC CCG 107 Ala Leu Asn His Ala Val Leu Arg Ala Leu Met His Ala Ala Ala Pro 315 320 325 GGA GCC GCC GAC CTG CCC TGC TGC GTG CCC GCG CGC CTG TCG CCC ATC 111 Gly Ala Ala Asp Leu Pro Cys Cys Val Pro Ala Arg Leu Ser Pro He 330 335 340 345 TCC GTG CTC TTC TTT GAC AAC AGC GAC AAC GTG GTG CTG CGG CAG TAT 116 Ser Val Leu Phe Phe Asp Asn Ser Asp Asn Val Val Leu Arg Gin Tyr 350 355 360 GAG GAC ATG GTG GTG GAC GAG TGC GGC TGC CGC TAACCCGGGG CGGGCAGGGA 121 Glu Asp Met Val Val Asp Glu Cys Gly Cys Arg 365 370 CCCGGGCCCA ACAATAAATG CCGCGTGG 124 (2) INFORMATION FOR SEQ ID NO:33: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 372 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:33: Met Pro Pro Pro Gin Gin Gly Pro Cys Gly His His Leu Leu Leu Leu 1 5 10 15 Leu Ala Leu Leu Leu Pro Ser Leu Pro Leu Thr Arg Ala Pro Val Pro 20 25 30 Pro Gly Pro Ala Ala Ala Leu Leu Gin Ala Leu Gly Leu Arg Asp Glu 35 40 45 Pro Gin Gly Ala Pro Arg Leu Arg Pro Val Pro Pro Val Met Trp Arg 50 55 60 Leu Phe Arg Arg Arg Asp Pro Gin Glu Thr Arg Ser Gly Ser Arg Arg 65 70 75 80 Thr Ser Pro Gly Val Thr Leu Gin Pro Cys His Val Glu Glu Leu Gly 85 90 95 Val Ala Gly Asn He Val Arg His He Pro Asp Arg Gly Ala Pro Thr 100 105 110 Arg Ala Ser Glu Pro Val Ser Ala Ala Gly His Cys Pro Glu Trp Thr 115 120 125 Val Val Phe Asp Leu Ser Ala Val Glu Pro Ala Glu Arg Pro Ser Arg 130 135 140 Ala Arg Leu Glu Leu Arg Phe Ala Ala Ala Ala Ala Ala Ala Pro Glu 145 150 155 160 Gly Gly Trp Glu Leu Ser Val Ala Gin Ala Gly Gin Gly Ala Gly Ala 165 170 175 Asp Pro Gly Pro Val Leu Leu Arg Gin Leu Val Pro Ala Leu Gly Pro 180 185 190 Pro Val Arg Ala Glu Leu Leu Gly Ala Ala Trp Ala Arg Asn Ala Ser 195 200 205 Trp Pro Arg Ser Leu Arg Leu Ala Leu Ala Leu Arg Pro Arg Ala Pro 210 215 220 Ala Ala Cys Ala Arg Leu Ala Glu Ala Ser Leu Leu Leu Val Thr Leu 225 230 235 240 Asp Pro Arg Leu Cys His Pro Leu Ala Arg Pro Arg Arg Asp Ala Glu 245 250 255 Pro Val Leu Gly Gly Gly Pro Gly Gly Ala Cys Arg Ala Arg Arg Leu 260 265 270 Tyr Val Ser Phe Arg Glu Val Gly Trp His Arg Trp Val He Ala Pro 275 280 285 Arg Gly Phe Leu Ala Asn Tyr Cys Gin Gly Gin Cys Ala Leu Pro Val 290 295 300 Ala Leu Ser Gly Ser Gly Gly Pro Pro Ala Leu Asn His Ala Val Leu 305 310 315 320 Arg Ala Leu Met His Ala Ala Ala Pro Gly Ala Ala Asp Leu Pro Cys 325 330 335 Cys Val Pro Ala Arg Leu Ser Pro He Ser Val Leu Phe Phe Asp Asn 340 345 350 Ser Asp Asn Val Val Leu Arg Gin Tyr Glu Asp Met Val Val Asp Glu 355 360 365 Cys Gly Cys Arg 370

Claims: What is claimed is: 1. A method for enhancing integration of a tooth in a mammalian tooth socket, the method comprising the step of: providing a therapeutically effective concentration of a morphogen to the tooth socket surface, said concentration being sufficient to induce periodontal tissue morphogenesis in said socket. 2. The method of claim 1 wherein said step of providing a therapeutically effective morphogen concentration to said surface comprises the step of administering to said mammal a therapeutically effective concentration of a morphogen. 3. The method of claim 1 wherein said step of providing a therapeutically effective morphogen concentration to said surface comprises the step of administering to said mammal an agent that stimulates jLn vivo a therapeutically effective concentration of an endogenous morphogen. 4. The method of claim 2 or 3 wherein said morphogen or morphogen-stimulating agent is disposed on the surface of the tooth root prior to implantation of said tooth in said tooth socket. 5. The method of claim 2 or 3 wherein said morphogen or morphogen-stimulating agent is disposed on the surface of the tooth socket prior to implantation of said tooth in said tooth socket. 6. The method of claim 4 wherein said tooth root surface is partially demineralized. 7. The method of claim 5 wherein said tooth root surface is partially demineralized. 8. The method of claim 1 wherein said tooth is an implanted tooth. 9. The method of claim 1 wherein said tooth is a prosthetic tooth. 10. The method of claim 9 wherein said prosthetic tooth is an allogenic or autologous tooth. 11. The method of claim 1 wherein said therapeutically effective concentration is sufficient to induce differentiation and proliferation of cementoblasts or periodontoblasts. 12. The method of claim 1 wherein said therapeutically effective concentration is sufficient to induce formation of periodontal ligament or cementum. 13. The method of claim 2 or 3 wherein said morphogen or morphogen stimulating agent is administered to said mammal dispersed in an acellular matrix material. 14. The method of claim 13 wherein said matrix material is derived from dentin, periodontal ligament, bone, or cementum tissue. 15. A method for regenerating periodontal tissue in a mammalian tooth socket, the method comprising the step of: providing to the locus of the tooth socket a therapeutically effective concentration of a morphogen sufficient to induce formation of periodontal ligament or cementum. 16. A method for inhibiting the tissue damage associated with periodontal disease, the method comprising the step of: providing a therapeutically effective concentration of a morphogen to the periodontal tissue at risk of damage. 17. A method for inhibiting periodontal tissue loss in a mammal, the method comprising the step of providing a therapeutically effective concentration of a morphogen to an implanted tooth or tooth socket surface, said concentration being sufficient to induce regeneration of lost or damaged periodontium. 18. The method of claim 1, 15, 16 or 17 wherein said therapeutic morphogen concentration is less than about 50μg. 19. The method of claim 18 wherein said therapeutic morphogen concentration is less than about 25μg. 20. The method of claim 1, 15, 16 or 17 wherein said therapeutically effective concentration is sufficient to induce formation of periodontal ligament or cementum. 21. The method of claim 1, 15, 16 or 17 wherein said therapeutic morphogen concentration is sufficient to induce proliferation and differentiation of cementoblasts or periodontoblasts. 22. The method of claim 15, 16 or 17 wherein said morphoge is provided to said tissue by administering to said mammal a therapeutically effective concentration of a morphogen. 23. The method of claim 15, 16 or 17 wherein said morphoge is provided to said tissue by administering to said mammal an agent that stimulates in vivo a therapeutically effective concentration of an endogenous morphogen. 24. A method for preparing a tooth for implantation in a mammalian tooth socket, said socket being significantl reduced in viable periodontal tissue, the method comprising the steps of: (a) disposing a therapeutically effective concentratio of a morphogen about the exterior surface of a tooth root to be implanted; (b) preparing a tooth socket to receive said tooth; an (c) implanting said tooth in said socket. 25. The method of claim 24 comprising the additional step of partially demineralized the tooth root surface before disposing said morphogen on said surface. 26. A method for preparing a tooth socket to receive a tooth, said tooth socket being significantly reduced i viable peridontal tissue, the method comprising the steps of: (a) preparing the tooth socket to receive a tooth; (b) disposing on the tooth socket surface a therapeutically effective concentration of a morphogen; and (c) implanting said tooth in said prepared socket. 27. The method of claim 26 wherein said tooth root surface is partially demineralized before implantation. 28. The method of claim 1, 15, 16, 17, 24 or 26 wherein said morphogen comprises an amino acid sequence sharin at least 70% homology with one of the sequences selected from the group consisting of: OP-1, OP-2, CBMP2, Vgl(fx), Vgr(fx), DPP(fx), GDF-1(fx) and 60A(fx). 29. The method of claim 28 wherein said morphogen comprise an amino acid sequence sharing a last 80% homology wit one of the sequences selected from the group consistin Of: OP-1, OP-2, CBMP2, BMP3(fx), BMP5(fx), BMP6(fx), Vgl(fx), Vgr(fx), DPP(fx), GDF-l(fx) and 60A(fx). 30. The method of claim 1, 15, 16, 17, 24 or 26 wherein said morphogen comprises an amino acid sequence having greater than 60% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 31. The method of claim 30 wherein said morphogen comprises an amino acid sequence having greater than 65% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 32. The method of claim 31 wherein said morphogen comprises an amino acid sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl), including allelic and species variants thereof. 33. The method of claim 1, 15, 16, 17, 24 or 26 wherein said morphogen comprises an amino acid sequence defined by Generic Sequences 1, 2, 3, 4, 5 or 6 (Seq. ID Nos. 1, 2, 3, 4, 30 or 31). 34. The method of claim 1, 15, 16, 17, 24 or 26 wherein said morphogen comprises an amino acid sequence define by OPX (Seq. ID No. 29). 35. A composition for inhibiting periodontal tissue loss i a mammal, said composition comprising a therapeutic concentration of a morphogen in association with a symptom alleviating cofactor. 36. The composition of claim 35 wherein said therapeutically effective concentration is sufficient to induce periodontal tissue morphogenesis. 37. The composition of claim 35 wherein said therapeutically effective concentration is sufficient to enhance integration of an implanted tooth in a tooth socket. 38. The composition of claim 35 wherein said cofactor comprises an antibiotic. 39. The composition of claim 35 wherein said cofactor is an antiseptic. 40. The composition of claim 35 wherein said cofactor comprises an analgesic or anesthetic. 41. The composition of claim 38 wherein said cofactor comprises tetracycline. 42. The composition of claim 35 wherein said morphogen comprises an amino acid sequence sharing at least 70% homology with one of the sequences selected from the group consisting of: OP-1, OP-2, CBMP2, Vgl(fx), Vgr(fx), DPP(fx), GDF-l(fx) and 60A(fx). 43. The composition of claim 42 wherein said morphogen comprises an amino acid sequence sharing a last 80% homology with one of the sequences selected from the group consisting of: OP-1, OP-2, CBMP2, BMP3(fx), BMP5(fx), BMP6(fx), Vgl(fx), Vgr(fx), DPP(fx), GDF-l(fx) and 60A(fx). 44. The composition of claim 43 wherein said morphogen comprises an amino acid sequence having greater than 60% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 45. The composition of claim 44 wherein said morphogen comprises an amino acid sequence having greater than 65% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 46. The composition of claim 45 wherein said morphogen comprises an amino acid sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl), including allelic and species variants thereof. 47. The composition of claim 46 wherein said morphogen comprises an amino acid sequence defined by Generic Sequences 1, 2, 3, 4, 5 or 6 (Seq. ID Nos. 1, 2, 3, 4, 30 or 31). 48. The composition of claim 47 wherein said morphogen comprises an amino acid sequence defined by OPX (Seq. ID No. 29). 49. The composition of claim 35 wherein said morphogen is dispersed in an acellular matrix. 50. The composition of claim 49 wherein said acellular matrix is derived from dentin, bone, periodontal ligament or cementum tissue. 51. The composition of claim 35 wherein said composition comprises a solution of high viscosity. 52. The method of claim 1, 15, 16 or 17 wherein said morphogen species provided comprises the pro form. 53. The method of claim 32 wherein said morphogen species provided comprises the pro form. 54. The method of claim 53 wherein said morphogen comprises an amino acid sequence defined by residues 30-431 of Seq. ID No. 16 (hOPl), including allelic and species variants thereof. 55. The composition of claim 35 wherein said morphogen species provided comprises the pro form. 56. The composition of claim 46 wherein said morphogen species provided comprises the pro form. 57. The composition of claim 55 wherein said morphogen comprises an amino acid sequence defined by residues 30-431 of Seq. ID No. 16 (hOP-l), including allelic and species variants thereof. 58. The method of claim 3 or 23 wherein said agent stimulates expression of a morphogen in a tissue other than periodontal, dentin, or alveolar bone. 59. The use of a morphogen in the manufacture of a pharmaceutical to enhance the integration of a tooth i a tooth socket. 60. The use of a morphogen in the manufacture of a pharmaceutical to regenerate periodontal tissue or to inhibit periodontal tissue loss or the tissue damage associated with periodontal disease. 61. The use according to 59 or 60 wherein said morphogen comprises an amino acid sequence sharing at least 70% homology with one of the sequences selected from the group consisting of: OP-1, OP-2, CBMP2, Vgl(fx), Vgr(fx), DPP(fx), GDF-l(fx) and 60A(fx). 62. The use according to claim 61 wherein said morphogen comprises an amino acid sequence sharing a least 80% homology with one of the sequences selected from the group consisting of: OP-1, OP-2, CBMP2, BMP3(fx), BMP5(fx), BMP6(fx), Vgl(fx), Vgr(fx), DPP(fx), GDF-1(fx) and 60A(fx). 63. The use according to claim 59 or 60 wherein said morphogen comprises an amino acid sequence having greater than 60% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 64. The use according to claim 63 wherein said morphogen comprises an amino acid sequence having greater than 65% amino acid identity with the sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl). 65. The use according to claim 63 wherein said morphogen comprises an amino acid sequence defined by residues 43-139 of Seq. ID No. 5 (hOPl), including allelic and species variants thereof. 66. The use according to claim 59 or 60 wherein said morphogen comprises an amino acid sequence defined by Generic Sequences 1, 2, 3, 4, 5 or 6 (Seq. ID Nos. 1, 2, 3, 4, 30 or 31) . 67. The use according to claim 59 or 60 wherein said morphogen comprises an amino acid sequence defined by OPX (Seq. ID No. 29). 68. The invention of claim 1, 15, 16, 17, 35, 59 or 60 wherein said morphogen comprises a polypeptide chain encoded by a nucleic acid that hybridizes under stringent conditions with the DNA sequence defined by nucleotides 1036-1341 of Seq. ID No. 16 or nucleotides 1390-1695 of Seq. ID No. 20. 69. The invention of claim 1, 15, 16, 17, 35, 59 or 60 wherein said morphogen comprises a dimeric protein species complexed with a peptide comprising a pro region of a member of the morphogen family, or an allelic, species or other sequence variant thereof. 70. The invention of claim 69 wherein said dimeric morphogen species is noncovalently complexed with said peptide. 71. The invention of claim 69 wherein said dimeric morphogen species is complexed with two said peptides. 72. The invention of claim 69 wherein said peptide comprises at least the first 18 amino acids of a sequence defining said pro region. 73. The invention of claim 72 wherein said peptides comprises the full length form of said pro region. 74. The invention of claim 69 wherein said peptide comprises a nucleic acid that hybridizes under stringent hybridization conditions with a DNA defined by nucleotides 136-192 of Seq. ID No. 16, or nucleotides 157-211 of Seq. ID No. 20. 75. The invention of claim 69 wherein said complex is further stabilized by exposure to a basic amino acid, a detergent or a carrier protein.

Inventors: COHEN CHARLES M, KUBERASAMPATH THANGAVEL, OPPERMANN HERMANN, OZKAYNAK ENGIN, PANG ROY H L, RUEGER DAVID C, SMART JOHN E, COHEN, CHARLES, M., KUBERASAMPATH, THANGAVEL, OPPERMANN, HERMANN, OZKAYNAK, ENGIN, PANG, ROY, H., L., RUEGER, DAVID, C., SMART, JOHN, E.
Applicants: CREATIVE BIOMOLECULES INC, CREATIVE BIOMOLECULES, INC.
Application year: 1993
Main classification: A61K6
IPC codes: A61F2, A61K6, A61K38, A61K45, A61K48, A61L27, A61P1, A61P43, C07K14, C07K16, C12N15