RPS2 GENE AND USES THEREOF

Abstract: Disclosed is substantially pure DNA encoding an Arabidopsis thaliana Rps2 polypeptide; substantially pure Rps2 polypeptide; and methods of using such DNA to express the Rps2 polypeptide in plant cells and whole plants to provide, in transgenic plants, disease resistance to pathogens.

Description: RPS2 GENE AND USES THEREOF Background of the Invention The invention relates to recombinant plant nucleic acids and polypeptides and* uses thereof to confer disease resistance to pathogens in transgenic plants. Plants employ a variety of defensive strategies to combat pathogens. One defense response, the so-called hypersensitive response (HR) , involves rapid localized necrosis of infected tissue. In several host-pathogen interactions, genetic analysis has revealed a gene-for- gene correspondence between a particular avirulence (avr) gene in an avirulent pathogen that elicits an HR in a host possessing a particular resistance gene. Summary of the Invention In general, the invention features substantially pure DNA (for example, genomic DNA, cDNA or synthetic DNA) encoding an Rps polypeptide as defined below. In related aspects, the invention also features a vector, a cell (e.g., a plant cell), and a transgenic plant or seed thereof which includes such a substantially pure DNA encoding an Rps polypeptide. In preferred embodiments, an RPS gene [SEQ. ID NO:5] is the RPS2 gene of a plant of the genus Arabidopsis . In various preferred embodiments, the cell is a transformed plant cell derived from a cell of a transgenic plant. In related aspects, the invention features a transgenic plant containing a transgene which encodes an Rps polypeptide that is expressed in plant tissue susceptible to infection by pathogens expressing the avrRpt2 avirulence gene [SEQ. ID. NO:105] or pathogens expressing an avirulence signal similarly recognized by an Rps polypeptide. In a second aspect, the invention features a substantially pure DNA which includes a promoter capable of expressing the RPS2 gene [SEQ. ID. N0:1] in plant tissue susceptible to infection by bacterial pathogens expressing the avrRpt2 avirulence gene [SEQ. ID NO:105]. In preferred embodiments, the promoter is the promoter native to an RPS gene. Additionally, transcriptional and translational regulatory regions are preferably native to an RPS gene. The transgenic plants of the invention are preferably plants which are susceptible to infection by a pathogen expressing an avirulence gene, preferably the avrRpt2 avirulence gene [SEQ ID. NO:105]. In preferred embodiments the transgenic plant is from the group of plants consisting of but not limited to Arabidopsis, tomato, soybean, bean, maize, wheat and rice. In another aspect, the invention features a method of providing resistance in a plant to a pathogen which involves: (a) producing a transgenic plant cell having a transgene encoding an Rps2 polypeptide wherein the transgene is integrated into the genome of the transgenic plant and is positioned for expression in the plant cell; and (b) growing a transgenic plant from the transgenic plant cell wherein the RPS2 transgene is expressed in the transgenic plant. In another aspect, the invention features a method of detecting a resistance gene in a plant cell involving: (a) contacting the RPS2 gene [SEQ ID N0:1] or a portion thereof greater than 18 nucleic acids in length with a preparation of genomic DNA from said plant cell under hybridization conditions providing detection of DNA sequences having about 50% or greater sequence identity to the DNA sequence of Fig. 2 encoding the Rps2 polypeptide [SEQ. ID N0S:2-5]. In another aspect, the invention features a method of producing an Rps2 polypeptide which involves: (a) providing a cell transformed with DNA encoding an Rps2 polypeptide positioned for expression in the cell; (b) culturing the transformed cell under conditions for expressing the DNA; and (c) isolating the Rps2 polypeptide. In another aspect, the invention features substantially pure Rps2 polypeptide. Preferably, the polypeptide includes a greater than 50 amino acid sequence substantially identical to a greater than 50 amino acid sequence shown in Fig. 2, open reading frame "a". Most preferably, the polypeptide is the Arabidopsis thaliana Rps2 polypeptide [SEQ. ID N0S:2-5]. In another aspect, the invention features a method of providing resistance in a transgenic plant to infection by pathogens which do not carry the avrRpt2 avirulence gene wherein the method includes: (a) producing a transgenic plant cell having transgenes encoding an Rps2 polypeptide as well as a transgene encoding the avrRpt2 gene product [SEQ ID. NO:106] wherein the transgenes are integrated into the genome of the transgenic plant; are positioned for expression in the plant cell; and the avrRpt2 transgene and, if desired, the RPS2 gene, are under the control of regulatory sequences suitable for controlled expression of the gene(s); and (b) growing a transgenic plant from the transgenic plant cell wherein the RPS2 and avrRpt2 transgenes are expressed in the transgenic plant. In another aspect, the invention features a method of providing resistance in a transgenic plant to infection by pathogens in the absence of avirulence gene expression in the pathogen wherein the method involves: (a) producing a transgenic plant cell having integrated in the genome a transgene containing the RPS2 gene under the control of a promoter providing constitutive expression of the RPS2 gene; and (b) growing a transgenic plant from the transgenic plant cell wherein the RPS2 transgene is expressed constitutively in the transgenic plant. In another aspect, the invention features a method of providing controllable resistance in a transgenic plant to infection by pathogens in the absence of avirulence gene expression in the pathogen wherein the method involves: (a) producing a transgenic plant cell having integrated in the genome a transgene containing the RPS2 gene under the control of a promoter providing controllable expression of the RPS2 gene; and (b) growing a transgenic plant from the transgenic plant cell wherein the RPS2 transgene is controllably expressed in the transgenic plant. In preferred embodiments, the RPS2 gene is expressed using a tissue-specific or cell type- specific promoter, or by a promoter that is activated by the introduction of an external signal or agent, such as a chemical signal or agent. By "disease resistance gene" is meant a gene encoding a polypeptide capable of triggering the plant defense response in a plant cell or plant tissue. An RPS gene is a disease resistance gene having about 50% or greater sequence identity to the RPS2 sequence [SEQ ID. NO:l] of Fig. 2 or a portion thereof. The gene, RPS2 , is a disease resistance gene encoding the Rps2 disease resistance polypeptide [SEQ. ID NOS:2-5] from Arabidopsis thaliana . By "polypeptide" is meant any chain of amino acids, regardless of length or post-translational modification (e.g., glycosylation or phosphorylation) . By "substantially identical" is meant a polypeptide or nucleic acid exhibiting at least 50%, preferably 85%, more preferably 90%, and most preferably 95% homology to a reference amino acid or nucleic acid sequence. For polypeptides, the length of comparison sequences will generally be at least 16 amino acids, preferably at least 20 amino acids, more preferably at least 25 amino acids, and most preferably 35 amino acids. For nucleic acids, the length of comparison sequences will generally be at least 50 nucleotides, preferably at least 60 nucleotides, more preferably at least 75 nucleotides, and most preferably 110 nucleotides. Sequence identity is typically measured using sequence analysis software (e.g., Sequence Analysis Software Package of the Genetics Computer Group, University of Wisconsin Biotechnology Center, 1710 University Avenue, Madison, WI 53705) . Such software matches similar sequences by assigning degrees of homology to various substitutions, deletions, substitutions, and other modifications. Conservative substitutions typically include substitutions within the following groups: glycine alanine; valine, isoleucine, leucine; aspartic acid, glutamic acid, asparagine, glutamine; serine, threonine; lysine, arginine; and phenylalanine, tyrosine. By a "substantially pure polypeptide" is meant an Rps2 polypeptide which has been separated from components which naturally accompany it. Typically, the polypeptide is substantially pure when it is at least 60%, by weight, free from the proteins and naturally-occurring organic molecules with which it is naturally associated. Preferably, the preparation is at least 75%, more preferably at least 90%, and most preferably at least 99%, by weight, Rps2 polypeptide. A substantially pure Rps2 polypeptide may be obtained, for example, by extraction from a natural source (e.g., a plant cell); by expression of a recombinant nucleic acid encoding an Rps2 polypeptide; or by chemically synthesizing the protein. Purity can be measured by any appropriate method, e.g., those described in column chromatography, polyacrylamide gel electrophoresis, or by HPLC analysis. A protein is substantially free of naturally associated components when it is separated from those contaminants which accompany it in its natural state. Thus, a protein which is chemically synthesized or produced in a cellular system different from the cell from which it naturally originates will be substantially free from its naturally associated components. Accordingly, substantially pure polypeptides include those derived from eukaryotic organisms but synthesized in E. coli or other prokaryotes. By "substantially pure DNA" is meant DNA that is free of the genes which, in the naturally-occurring genome of the organism from which the DNA of the invention is derived, flank the gene. The term therefore includes, for example, a recombinant DNA which is incorporated into a vector; into an autonomously replicating plasmid or virus; or into the genomic DNA of a prokaryote or eukaryote; or which exists as a separate molecule (e.g., a cDNA or a genomic or cDNA fragment produced by PCR or restriction endonuclease digestion) independent of other sequences. It also includes a recombinant DNA which is part of a hybrid gene encoding additional polypeptide sequence. By "transformed cell" is meant a cell into which (or into an ancestor of which) has been introduced, by means of recombinant DNA techniques, a DNA molecule encoding (as used herein) an Rps2 polypeptide. By "positioned for expression" is meant that the DNA molecule is positioned adjacent to a DNA sequence which directs transcription and translation of the sequence (i.e., facilitates the production of, e.g., an Rps2 polypeptide, a recombinant protein or a RNA molecule) . By "reporter gene" is meant a gene whose expression may be assayed; such genes include, without limitation, 0-glucuronidase (GUS) , luciferase, chloramphenicol transacetylase (CAT) , and β- galactosidase. By "promoter" is meant minimal sequence sufficient to direct transcription. Also included in the invention are those promoter elements which are sufficient to render promoter-dependent gene expression controllable for cell-type specific, tissue-specific or inducible by external signals or agents; such elements may be located in the 5' or 3' regions of the native gene. By "operably linked" is meant that a gene and a regulatory sequence(s) are connected in such a way as to permit gene expression when the appropriate molecules (e.g., transcriptional activator proteins) are bound to the regulatory sequence(s) . By "plant cell" is meant any self-propagating cell bounded by a semi-permeable membrane and containing a plastid. Such a cell also requires a cell wall if further propagation is desired. Plant cell, as used herein includes, without limitation, algae, cyanobacteria, seeds suspension cultures, embryos, meristematic regions, callus tissue, leaves, roots, shoots, gametophytes, sporophytes, pollen, and microspores. By "transgene" is meant any piece of DNA which is inserted by artifice into a cell, and becomes part of the genome of the organism which develops from that cell. Such a transgene may include a gene which is partly or entirely heterologous (i.e., foreign) to the transgenic organism, or may represent a gene homologous to an endogenous gene of the organism. By "transgenic" is meant any cell which includes a DNA sequence which is inserted by artifice into a cell and becomes part of the genome of the organism which develops from that cell. As used herein, the transgenic organisms are generally transgenic plants and the DNA (transgene) is inserted by artifice into the nuclear or plastidic genome. By "pathogen" is meant an organism whose infection into the cells of viable plant tissue elicits a disease response in the plant tissue. Other features and advantages of the invention will be apparent from the following description of the preferred embodiments thereof, and from the claims. Detailed Description The drawings will first be described. Drawings Figs. 1A - IF are a schematic summary of the physical and RFLP analysis that led to the cloning of the RPS 2 locus. Fig. 1A is a diagram showing the alignment of the genetic and the RFLP maps of the relevant portion of Arabidopsis thaliana chromosome IV adapted from the map published by Lister and Dean (1993) Plant J. 4:745-750. The RFLP marker L11F11 represents the left arm of the YUP11F11 YAC clone. Fig. IB is a diagram showing the alignment of relevant YACs around the RPS2 locus. YAC constructs designated YUP16G5, YUP18G9 and YUP11F11 were provided by J. Ecker, University of Pennsylvania. YAC constructs designated EW3H7, EW11D4, EW11E4, and EW9C3 were provided by E. Ward, Ciba-Geigy, Inc. Fig. 1C is a diagram showing the alignment of cosmid clones around the RPS2 locus. Cosmid clones with the designation H are derivatives of the EW3H7 YAC clone whereas those with the designation E are derivatives of the EW11E4 YAC clone. Vertical arrows indicate the relative positions of RFLP markers between the ecotypes La-er and the rps2-101N plant. The RFLP markers were identified by screening a Southern blot containing more than 50 different restriction enzyme digests using either the entire part or pieces of the corresponding cosmid clones as probes. The cosmid clones described in Fig. 1C were provided by J. Giraudat, C.N.R.S., Gif-sur-Yvette, France. Figs. ID and IE are maps of .EσoRI restriction endonuclease sites in the cosmids E4-4 and E4-6, respectively. The recombination break points surrounding the RPS2 locus are located within the 4.5 and 7.5 kb .EcoRI restriction endonuclease fragments. Fig. IF is a diagram showing the approximate location of genes which encode the RNA transcripts which have been identified by polyA + RNA blot analysis. The sizes of the transcripts are given in kilobase pairs below each transcript. Fig. 2 is the complete nucleotide sequence of cDNA-4 comprising the RPS2 [SEQ. ID. NO: 1] gene locus. The three reading frames are shown below the nucleotide sequence. The deduced amino acid sequence [SEQ. ID NOS:2- 5] of reading frame "a" is provided and contains 909 amino acids. The methionine encoded by the ATG start codon is circled in open reading frame "a" of Fig. 2. The A of the ATG start codon is nucleotide 31 of Fig. 2. Fig. 3 is the. nucleotide sequence of the avrRpt2 gene [SEQ. ID NO:105] and its deduced amino acid sequence [SEQ. ID N0:106]. A potential ribosome binding site is underlined. An inverted repeat is indicated by horizontal arrows at the 3 ' end of the open reading frame. The deduced amino acid sequence is provided below the nucleotide sequence of the open reading frame. Fig. 4 is a schematic summary of the complementation analysis that allowed functional confirmation that the DNA carried on p4104 and p4115 (encoding cDNA-4) confers RPS2 disease resistance activity to Arabidopsis thaliana plants previously lacking RPS2 disease resistance activity. Small vertical marks along the "genome" line represent restriction enzyme EcoRI recognition sites, and the numbers above this line represent the size, in kilobasepairs (kb) , of the resulting DNA fragments (see also Fig. IE) . Opposite "cDNAs" are the approximate locations of the coding sequences for RNA transcripts (See also Fig. IF) ; arrowheads indicate the direction of transcription for cDNAs 4, 5, and 6. For functional complementation experiments, rps2-201C/rps2-201C plants were genetically transformed with the Arabidopsis thaliana genomic DNA sequences indicated; these sequences were carried on the named plasmids (derivatives of the binary cosmid vector pSLJ4541) and delivered to the plant via Agrobacterium- mediated transformation methods. The disease resistance phenotype of the resulting transfor ants following inoculation with P. syringae expressing avrRpt2 is given as "Sus." (susceptible, no resistance response) or "Res." (disease resistant) . The Genetic Basis for Resistance to Pathogens An overview of the interaction between a plant host and a microbial pathogen is presented. The invasion of a plant by a potential pathogen can have a range of outcomes delineated by the following outcomes: either the pathogen successfully proliferates in the host, causing associated disease symptoms, or its growth is halted by the host defenses. In some plant-pathogen interactions, the visible hallmark of an active defense response is the so-called hypersensitive response or "HR". The HR involves rapid necrosis of cells near the site of the infection and may include the formation of a visible dry brown lesion. Pathogens which elicit an HR on a given host are said to be avirulent on that host, the host is said to be resistant, and the plant-pathogen interaction is said to be incompatible. Strains which proliferate and cause disease on a particular host are said to be virulent; in this case the host is said to be susceptible. and the plant-pathogen interaction is said to be compatible "Classical" genetic analysis has been used successfully to help elucidate the genetic basis of plant-pathogen recognition for those cases in which a series of strains (races) of a particular fungal or bacterial pathogen are either virulent or avirulent on a series of cultivars (or different wild accessions) of a particular host species. In many such cases, genetic analysis of both the host and the pathogen revealed that many avirulent fungal and bacterial strains differ from virulent ones by the possession of one or more avirulence (avr) genes that have corresponding "resistance" genes in the host. This avirulence gene-resistance gene correspondence is termed the "gene-for-gene" model (Crute, et al., (1985) pp 197-309 in: Mechanisms of Resistance to Plant Disease . R.S.S. Fraser, ed. ; Ellingboe, (1981) Annu. Rev. Phytopathol. 19:125-143; Flor, (1971) Annu. Rev. Phytopathol. 9:275-296; Keen and Staskawicz, (1988) supra; and Keen et al. in: Application of Biotechnology to Plant Pathogen Control . I. Chet, ed. , John Wiley & Sons, 1993, pp. 65-88) . According to a simple formulation of this model, plant resistance genes encode specific receptors for molecular signals generated by avr genes. Signal transduction pathway(s) then carry the signal to a set of target genes that initiate the HR and other host defenses (Gabriel and Rolfe, (1990) Annu. Rev. Phytopathol. 28:365-391). Despite this simple predictive model, the molecular basis of the avr- resistance gene interaction is still unknown. One basic prediction of the gene-for-gene hypothesis has been convincingly confirmed at the molecular level by the cloning of a variety of bacterial avr genes (Innes, et al., (1993) J. Bacteriol. 175:4859- 4869; Dong, et al., (1991) Plant Cell 3:61-72; Whelan et al., (1991) Plant Cell 3:49-59; Staskawicz et al., (1987) J. Bacteriol. 169:5789-5794; Gabriel et al., (1986) P.N.A.S., USA 83:6415-6419; Keen and Staskawicz, (1988) Annu. Rev. Microbiol. 42:421-440; Kobayashi et al., (1990) Mol. Plant-Microbe Interact. 3:94-102 and (1990) Mol. Plant-Microbe Interact. 3:103-111). Many of these cloned avirulence genes have been shown to correspond to individual resistance genes in the cognate host plants and have been shown to confer an avirulent phenotype when transferred to an otherwise virulent strain. The avrRpt2 locus was isolated from Pseudomonas syringae pv. tomato and sequenced by Innes et al. (Innes, R. et al. (1993) J. Bacteriol. 175:4859-4869) . Fig. 3 is the nucleotide sequence [SEQ. ID NO:105] and deduced amino acid sequence [SEQ. ID NO:6] of the avrRpt2 gene. Examples of known signals to which plants respond when infected by pathogens include harpins from Erwinia (Wei et al. (1992) Science 257:85-88) and Pseudomonas (He et al. (1993) Cell 73:1255-1266); avr4 (Joosten et al. (1994) Nature 367:384-386) and avr9 peptides (van den Ackerveken et al (1992) Plant J. 2:359-366) from Cladosporium; PopAl from Pseudomonas (Arlat et al. (1994) EMBO J. 13:543-553); avrD-generated lipopolysaccharide (Midland et al. (1993) J. Org. Chem. 58:2940-2945); and NIP1 from Rhynchosporium (Hahn et al. (1993) Mol. Plant- Microbe Interact. 6:745-754). Compared to avr genes, considerably less is known about plant resistance genes that correspond to specific avr-generated signals. The plant resistance gene, -P.S2 (rps for resistance to Pseudomonas syringae) , the first gene of a new, previously unidentified class of plant disease resistance genes corresponds to a specific avr gene (avrRpt2) . Some of the work leading up to the cloning of RPS2 is described in Yu, et al., (1993), Molecular Plant-Microbe Interactions 6:434-443 and in Kunkel, et al., (1993) Plant Cell 5:865-875. An apparently unrelated avirulence gene which corresponds specifically to plant disease resistance gene, Pto, has been isolated from tomato (Lycopersicon esculentum) (Martin et al., (1993) Science 262:1432-1436). Tomato plants expressing the Pto gene are resistant to infection by strains of Pseudomonas syringae pv. tomato that express the avrPto avirulence gene. The amino acid sequence inferred from the Pto gene DNA sequence displays strong similarity to serine-threonine protein kinases, implicating Pto in signal transduction. No similarity to the tomato Pto locus or any known protein kinases was observed for RPS2, suggesting that RPS2 is representative of a new class of plant disease resistance genes. The isolation of a race-specific resistance gene from Zea mays (corn) known as Hml has been reported (Johal and Briggs (1992) Science 258:985-987) . Hml confers resistance against specific races of the fungal pathogen Cochliobolus carbonum by controlling degradation of a fungal toxin, a strategy that is mechanistically distinct from the avirulence-gene specific resistance of the RPS2-avrRpt2 resistance mechanism. The cloned -P52 gene of the invention can be used to facilitate the construction of plants that are resistant to specific pathogens and to overcome the inability to transfer disease resistance genes between species using classical breeding techniques (Keen et al., (1993) , supra) . There now follows a description of the cloning and characterization of an Arabidopsis thaliana RPS2 genetic locus, the RPS2 genomic DNA, and the RPS2 cDNA. The avrRpt2 gene and the RPS2 gene, as well as mutants rpε2-101C, rps2-102C, and rps2-201C (also designated rps2-201 ) , are described in Dong, et al. , (1991) Plant Cell 3:61-72; Yu, et al. , (1993) supra; Kunkel et al., (1993) supra; Whalen et al. , (1991), supra; and Innes et al., (1993), supra) . A mutant designated rps2-101N has also been isolated. The identification and cloning of the RPS2 gene is described below. RPS2 Overcomes Sensitivity to Pathogens Carrying the ayrRpt2 Gene. To demonstrate the genetic relationship between an avirulence gene in the pathogen and a resistance gene in the host, it was necessary first to isolate an avirulence gene. By screening Pseudomonas strains that are known pathogens of crop plants related to Arabidopsis, highly virulent strains, P. syringae pv. maculicola (Psm) ES4326, P. syringae pv. tomato (Pst) DC3000, and an avirulent strain, Pst MM1065 were identified and analyzed as to their respective abilities to grow in wild type Arabidopsis thaliana plants (Dong et al . , (1991) Plant Cell, 3:61-72; Whalen et al., (1991) Plant Cell 3:49-59; MM1065 is designated JL1065 in Whalen et al.). Psm ES4326 or Pst DC3000 can multiply 10 4 fold in Arabidopsis thaliana leaves and cause water-soaked lesions that appear over the course of two days. Pst MM1065 multiplies a maximum of 10 fold in Arabidopsis thaliana leaves and causes the appearance of a mildly chlorotic dry lesion after 48 hours. Thus, disease resistance is associated with severely inhibited growth of the pathogen. An avirulence gene (avr) of the Pst MM1065 strain was cloned using standard techniques as described in Dong et al . (1991), Plant Cell 3:61-72; Whalen et al., (1991) supra; and Innes et al., (1993), supra. The isolated avirulence gene from this strain was designated avrRpt2. Normally, the virulent strain Psm ES4326 or Pst DC3000 causes the appearance of disease symptoms after 48 hours as described above. In contrast, Psm ES4326/avrRpt2 or Pst DC3000/avrRpt2 elicits the appearance of a visible necrotic hypersensitivity response (HR) within 16 hours and multiplies 50 fold less than Psm ES4326 or Pst DC3000 in wild type Arabidopsis thaliana leaves (Dong et al . , (1991), supra: and Whalen et al., (1991), supra) . Thus, disease resistance in a wild type Arabidopsis plant requires, in part, an avirulence gene in the pathogen or a signal generated by the avirulence gene. The isolation of four Arabidopsis thaliana disease resistance mutants has been described using the cloned avrRpt2 gene to search for the host gene required for disease resistance to pathogens carrying the avrRpt2 gene (Yu et al., (1993), supra: Kunkel et al., (1993), supra) . The four Arabidopsis thaliana mutants failed to develop an HR when infiltrated with Psm ES4326 /avrRpt2 or Pst DC3000 /avr Rpt2 as expected for plants having lost their disease resistance capacity. In the case of one of these mutants, approximately 3000 five to six week old M 2 ecotype Columbia (Col-0 plants) plants generated by ethyl methanesulfonic acid (EMS) mutagenesis were hand- inoculated with Psm ES4326/avrRpt2 and a single mutant, rps2-101C, was identified (resistance to Pseudomonas syringae) (Yu et al . , (1993), supra) . The second mutant was isolated using a procedure that specifically enriches for mutants unable to mount an HR (Yu et al . , (1993), supra) . When 10-day old Arabidopsis thaliana seedlings growing on petri plates are infiltrated with Pseudomonas syringae pv. phaseolicola (Psp) NPS3121 versus Psp NPS312 l/avrRpt2 , about 90% of the plants infiltrated with Psp NPS3121 survive, whereas about 90%-95% of the plants infiltrated with Psp NPS3121/avrRpt2 die. Apparently, vacuum infiltration of an entire small Arabidopsis thaliana seedling with Psp NPS3121/avr-pt2 elicits a systemic HR which usually kills the seedling. In contrast, seedlings infiltrated with Psp NPS3121 survive because Psp NPS3121 is a weak pathogen on Arabidopsis thaliana . The second disease resistance mutant was isolated by infiltrating 4000 EMS-mutagenized Columbia M 2 seedlings with Psp NPS312 l/avrRpt2 . Two hundred survivors were obtained. These were transplanted to soil and re-screened by hand inoculation when the .plants reached maturity. Of these 200 survivors, one plant failed to give an HR when hand- infiltrated with Psm ES4326/avrRpt2 . This mutant was designated rps2-102C (Yu et al . , (1993), supra). A third mutant, rps2-201C , was isolated in a screen of approximately 7500 M 2 plants derived from seed of Arabidopsis thaliana ecotype Col-O that had been mutagenized with diepoxybutane (Kunkel et al., (1993), supra) . Plants were inoculated by dipping entire leaf rosettes into a solution containing Pst DC3000 /avrRpt2 bacteria and the surfactant Silwet L-77 (Whalen et al., (1991) , supra) , incubating plants in a controlled environment growth chamber for three to four days, and then visually observing disease symptom development. This screen revealed four mutant lines (carrying the rps2-201C, rps2-202C r rps2-203C, and rps2-204C alleles) , and plants homozygous for rps2-201C were a primary subject for further study (Kunkel et al., (1993), supra and the instant application) . Isolation of the fourth rps2 mutant, rps2-101N, has not yet been published. This fourth isolate is either a mutant or a susceptible Arabidopsis ecotype. Seeds of the Arabidopsis Nossen ecotype were gamma- irradiated and then sown densely in flats and allowed to germinate and grow through a nylon mesh. When the plants were five to six weeKs old, the flats were inverted, the plants were partially submerged in a tray containing a culture of Psm ES4326/avrRpt2 , and the plants were vacuum infiltrated in a vacuum desiccator. Plants inoculated this way develop an HR within 24 hours. Using this procedure, approximately 40,000 plants were screened and one susceptible plant was identified. Subsequent RFLP analysis of this plant suggested that it may not be a Nossen mutant but rather a different Arabidopsis ecotype that is susceptible to Psm ES4326/avrRpt2. This plant is referred to as rps2-101N. The isolated mutants rpε2- 101C, rps2-102C, rps2-201C, and rps2-101N are referred to collectively as the n rps2 mutants". The rps2 Mutants Fail to Specifically Respond to the Cloned Avirulence Gene. ayrRpt2. The -PS2 gene product is specifically required for resistance to pathogens carrying the avirulence gene, avrRpt2. A mutation in Rps2 polypeptide that eliminates or reduces its function would be observable as the absence of a hypersensitive response upon infiltration of the pathogen. The rpε2 mutants displayed disease symptoms or a null response when infiltrated with Psm ES4326 I avrRptΣ , Pst DC3000/avrRpt2 or Psp NPS3121/avr-pt2, respectively. Specifically, no HR response was elicited, indicating that the plants were susceptible and had lost resistance to the pathogen despite the presence of the avrRpt2 gene in the pathogen. Pathogen growth in rps2 mutant plant leaves was similar in the presence and absence of the avrRpt2 gene. Psm ES4326 and Psm ES4326 favrRpt2 growth in rps2 mutants was compared and found to multiply equally well in the rps2 mutants, at the same rate that Psm Es4326 multiplied in wild-type Arabidopsis leaves. Similar results were observed for Pst DC3000 and Pst DC3000/ avr Rpt 2 growth in rps2 mutants. The rps2 mutants displayed a HR when infiltrated with Pseudomonas pathogens carrying other avr genes, Psm ES4326/avrB, Pst OC3000/avrB , Psm ES4326/avrRpml , Pst DC3000 /avrRpml . The -ability to mount an HR to an avr gene other than avrRpt2 indicates that the rps2 mutants isolated by selection with avrRpt2 are specific to avrRpt2. Mapping and Cloning of the RPS2 Gene. Genetic analysis of rps2 mutants rps2-101C, rps2- 102C, rps-201C and rps-lOlN showed that they all corresponded to genes that segregated as expected for a single Mendelian locus and that all four were most likely allelic. The four rps2 mutants were mapped to the bottom of chromosome IV using standard RFLP mapping procedures including polymerase chain reaction (PCR)-based markers (Yu et al . , (1993), supra; Kunkel et al . , (1993), supra; and Mindrinos, M. , unpublished). Segregation analysis showed that rps2-101C and rps2-102C are tightly linked to the PCR marker, PG11, while the RFLP marker M600 was used to define the chromosome location of the rps2-201C mutation (Fig. 1A) (Yu et al . , (1993), supra; Kunkel et al . , (1993), supra) . RPS2 has subsequently been mapped to the centromeric side of PG11. Heterozygous RPS2/rps2 plants display a defense response that is intermediate between those displayed by the wild-type and homdzygous rps2/rps2 mutant plants (Yu, et al., (1993), supra; and Kunkel et al., (1993), supra) . The heterozygous plants mounted an HR in response to Psm ES4326/avrJ?pt2 or Pst DC3000/ avr Rpt 2 infiltration; however, the HR appeared later than in wild type plants and required a higher minimum inoculum (Yu, et al., (1993), supra; and Kunkel et al., (1993), supra) . High Resolution Mapping of the -P52 Gene and -RPS2 cDNA Isolation. To carry out map-based cloning of the RPS2 gene, rps2-101N/rps2-101N was crossed with Landsberg erecta RPS2/RPS2. Plants of the F χ generation were allowed to self pollinate (to "self") and 165 F 2 plants were selfed to generate F 3 families. Standard RFLP mapping procedures showed that rps2-101N maps close to and on the centromeric side of the RFLP marker, PG11. To obtain a more detailed map position, rps2-101N/rps-101N was crossed with a doubly marked Landsberg erecta strain containing the recessive mutations, cer2 and ap2. The genetic distance between cer2 and ap2 is approximately 15 cM, and the rps2 locus is located within this interval. F 2 plants that displayed either a CER2 ap2 or a cer2 AP2 genotype were collected, selfed, and scored for -P.S2 by inoculating at least 20 F 3 plants for each F 2 with Psm ES4326/ avrRpt2. DNA was also prepared from a pool of approximately 20 F 3 plants for each F 2 line. The C-E-R2 ap2 and cer2 AP2 recombinants were used to carry out a chromosome walk that is illustrated in Figure 1. As shown in Figure 1, .RP-S2 was mapped to a 28-35 kb region spanned by cosmid clones E4-4 and E4-6. This region contains at least six genes that produce detectable transcripts. There were no significant differences in the sizes of the transcripts or their level of expression in the rps2 mutants as determined by RNA blot analysis. cDNA clones of each of these transcripts were isolated and five of these were sequenced. As is described below, one of these transcripts, cDNA-4, was shown to correspond to the RPS2 locus. From this study, three independent cDNA clones (cDNA-4-4, cDNA-4-5, and cDNA-4-11) were obtained corresponding to RPS2 from Columbia ecotype wild type plants. The apparent sizes of -RPS2 transcripts were 3.8 and 3.1 kb as determined by RNA blot analysis. A fourth independent cDNA-4 clone (cDNA-4-2453) was obtained using map-based isolation of -PS2 in a separate study. Yeast artificial chromosome (YAC) clones were identified that carry contiguous, overlapping inserts of Arabidopsis thaliana ecotype Col-0 genomic DNA from the M600 region spanning approximately 900 kb in the RPS2 region. Arabidopsis YAC libraries were obtained from J. Ecker and E. Ward, supra and from E. Grill (Grill and Somerville (1991) Mol. Gen. Genet. 226:484-490) . Cosmids designated "H" and "E" were derived from the YAC inserts and were used in the isolation of RPS2 (Fig. 1) . The genetic and physical location of -RPS2 was more precisely defined using physically mapped RFLP, RAPD (random amplified polymorphic DNA) and CAPS (cleaved amplified polymorphic sequence) markers. Segregating populations from crosses between plants of genotype RPS2/RPS2 (No-0 wild type) and rps2-201/rpε2-201 (Col-0 background) were used for genetic mapping. The RPS2 locus was mapped using markers 17B7LE, PG11, M600 and other markers. For high-resolution genetic mapping, a set of tightly linked RFLP markers was generated using insert end fragments from YAC and cosmid clones (Fig. 1) (Kunkel et al. (1993) , supra; Konieczny and Ausubel (1993) Plant J. 4:403-410; and Chang et al. (1988) PNAS USA 85:6856-6860). Cosmid clones E4-4 and E4-6 were then used to identify expressed transcripts (designated cDNA- 4, -5, -6, -7, -8 of Fig IF) from this region, including the cDNA-4-2453 clone. RPS2 DNA Sequence Analysis. DNA sequence analysis of cDNA-4 from wild-type Col-0 plants and from mutants rps2-101C , rps2-102C, rps2- 201C and rps2-101N showed that cDNA-4 corresponds to RPS2. DNA sequence analysis of rps2-101C, rps2-102C and rps2-201C revealed changes from the wild-type sequence as shown in Table 1. The numbering system in Table 1 starts at the ATG start codon encoding the first methionine where A is nucleotide 1. DNA sequence analysis of cDNA-4 corresponding to mutant rps2-102C showed that it differed from the wild type sequence at amino acid residue 476. Moreover, DNA sequence analysis of the cDNA corresponding to cDNA-4 from rps2-101N showed that it contained a 10 bp insertion at amino acid residue 581, a site within the leucine-rich repeat region which causes a shift in the RPS2 reading frame. Mutant rps2-101C contains a mutation that leads to the formation of a chain termination codon. The DNA sequence of mutant allele rps2-201C revealed a mutation altering a single amino acid within a segment of the LRR region that also has similarity to the helix- loop-helix motif, further supporting the designation of this locus as the RPS2 gene. The DNA and amino acid sequences are shown in Figure 2 [SEQ. ID NO:l and SEQ ID NOS:2-5, respectively]. Table 1. Mutant Wild type position of Change mutation rps2-101C 703 TGA 705 704 TAA Stop Codon rps2-101N 1741 GTG 1743 1741 GTGGAGTTGTATG Insertion rps2-102C 1426 AGA 1428 1427 AAA Amino acid 476 arg lys rps2-201C 2002 ACC 2004 2002 CCC Amino acid thr pro DNA sequence analysis of cDNA-4 corresponding to RPS2 from wild-type Col-0 plants revealed an open reading frame (between two stop codons) spanning 2,751 bp. There are 2,727 bp between -the first methionine codon of this reading frame and the 3'-stop codon, which corresponds to a deduced 909 amino acid polypeptide (See open reading frame "a" of Fig. 2) . The amino acid sequence has a relative molecular weight of 104,460 and a pi of 6.51. RPS2 belongs to a new class of disease resistance genes; the structure of the Rps2 polypeptide does not resemble the protein structure of the product of the only previously cloned and publicized avirulence gene-specific plant disease resistance gene, Pto, which has a putative protein kinase domain. From the above analysis of the deduced amino acid sequence, RPS2 contains several distinct protein domains conserved in other proteins from both eukaryotes and prokaryotes. These domains include but are not limited to Leucine Rich Repeats (LRR) (Kobe and Deisenhofer, (1994) Nature 366:751-756); P-loop (Saraste et al. (1990) Trends in Biological Sciences TIBS 15:430-434; Helix-Loop-Helix (Murre et al. (1989) Cell 56:777-783; and Leucine Zipper (Rodrigues and Park (1993) Mol. Cell Biol. 13:6711-6722). The amino acid sequence of Rps2 contains a LRR motif (LRR motif from amino acid residue 505 to amino acid residue 867) , which is present in many known proteins and which is thought to be involved in protein-protein interactions and may thus allow interaction with other proteins that are involved in plant disease resistance. The N-terminal portion of the Rps2 polypeptide LRR is, for example, related to the LRR of yeast (Saccharomyces cerevisiae) adenylate cyclase, CYR1. A region predicted to be a transmembrane spanning domain (Klein et al. (1985) Biochim. , Biophys. Acta 815:468-476) is located from amino acid residue 350 to amino acid residue 365, N-terminal to the LRR. An ATP/GTP binding site motif (P-loop) is predicted to be located between amino acid residue 177 and amino acid residue 194, inclusive. From the above analysis of the deduced amino acid sequence, the Rps2 polypeptide may have a membrane- receptor structure which consists of an N-terminal extracellular region and a C-terminal cytoplasmic region. Alternatively, the topology of the Rps2 may be the opposite: an N-terminal cytoplasmic region and a C- terminal extracellular region. LRR motifs are extracellular in many cases and the Rps2 LRR contains five potential N-glycosylation sites. Identification of -RPS2 by Functional Complementation. Complementation of rps2-201 homozygotes with genomic DNA corresponding to Arabidopsis thaliana functionally confirmed that the genomic region encoding cDNA-4 carries RPS2 activity. Cosmids were constructed that contained overlapping contiguous sequences of wild type Arabidopsis thaliana DNA from the RPS2 region contained in YACs EW11D4, EW9C3 , and YUP11F1 of Fig. 1 and Fig. 4. The cosmid vectors were constructed from pSLJ4541 (obtained from J. Jones, Sainsbury Institute, Norwich, England) which contains sequences that allow the inserted sequence to be integrated into the plant genome via Agro- aσteriu-Η-mediated transformation (designated "binary cosmid") . "H" and "E" cosmids (Fig. 1) were used to identify clones carrying DNA from the AraJ idopsis thaliana genomic RPS2 region. More than forty binary cosmids containing inserted RPS2 region DNA were used to transform rps2-201 homozygous mutants utilizing Agro- acterium-mediated transformation (Chang et al. ((1990) p. 28, Abstracts of the Fourth International Conference on Arabidopsis Research, Vienna, Austria) . Transformants which remained susceptible (determined by methods including the observed absence of an HR following infection to P. syringae pv. phaseolicola strain 3121 carrying avrRpt2 and Psp 3121 without avrRpt2) indicated that the inserted DNA did not contain functional RPS2. These cosmids conferred the "Sus." or susceptible phenotype indicated in Fig. 4. Transformants which had aquired avjri?pt2-specific disease resistance (determined by methods including the display of a strong hypersensitive response (HR) when inoculated with Psp 3121 with avrRpt2, but not following inoculation with Psp 3121 without avrRpt2) suggested that the inserted DNA contained a functional RPS2 gene capable of conferring the "Res." or resistant phenotype indicated in Fig. 4. Transformants obtained using the pD4 binary cosmid displayed a strong resistance phenotype as described above. The presence of the insert DNA in the transformants was confirmed by classical genetic analysis (the tight genetic linkage of the disease resistance phenotype and the kanamycin resistance phenotype conferred by the cotransformed selectable marker) and Southern analysis. These results indicated that RPS2 is encoded by a segment of the 18 kb Arabidopsis thaliana genomic region carried on cosmid pD4 (Fig. 4) . To further localize the RPS2 locus and confirm its ability to confer a resistance phenotype on the rps2-201 homozygous mutants, a set of six binary cosmids containing partially overlapping genomic DNA inserts were tested. The overlapping inserts pD2, pD4, pD14, pD15, pD27, and pD47 were chosen based on the location of the transcription corresponding to the five cDNA clones in the RPS2 region (Fig. 4) . These transformation experiments utilized a vacuum infiltration procedure (Bechtold et al. (1993) C.R. Acad. Sci. Paris 316:1194- 1199) for Aσrojbaσterium-mediated transformation. AgroJacteriu-Ti-mediated transformations with cosmids pD2, pD14, pD15, pD39, and pD46 were performed using a root transformation/regeneration protocol (Valveekens et al. (1988), PNAS 85:5536-5540). The results of pathogen inoculation experiments assaying for RPS2 activity in these transformants is indicated in Fig. 4. Additional transformation experiments utilized binary cosmids carrying the complete coding region and more than 1 kb of upstream genomic sequence for only cDNA-4 or cDNA-6. Using the vacuum infiltration transformation method, three independent transformants were obtained that carried the wild-type cDNA-6 genomic region in a rps2-201c homozygous background (pAD431 of Fig. 4) . None of these plants displayed avrRptΣ- dependent disease resistance. Homozygous rps2-201c mutants were transformed with wild-type genomic cDNA-4 (p4104 and p4115, each carrying Col-0 genomic sequences corresponding to all of the cDNA-4 open reading frame, plus approximately 1.7 kb of 5' upstream sequence and approximately 0.3 kb "of 3' sequence downstream of the stop codon) . These p4104 and p4115 transformants displayed a disease resistance phenotype similar to the wild-type RPS2 homozygotes from which the rps2 were derived. Additional mutants (rps2-101N and rps2-101C homozygotes) also displayed a vrRpt2-dependent resistance when transformed with the cDNA-4 genomic region. RPS2 Sequences Allow Detection of Other Resistance Genes. DNA blot analysis of Arabidopsis thaliana genomic DNA using RPS2 cDNA as the probe showed that Arabidopsis contains several DNA sequences that hybridize to RPS2 or a portion thereof, suggesting that there are several related genes in the Arabidopsis genome. From the aforementioned description and the nucleic acid sequence [SEQ. ID. N0:1] shown in Fig. 2, it is possible to isolate other plant disease resistance genes having about 50% or greater sequence identity to the RPS2 gene. Detection and isolation can be carried out with an oligonucleotide probe containing the RPS2 gene or a portion thereof greater than about 18 nucleic acids in length. Probes to sequences encoding specific structural features of the Rps2 polypeptide [SEQ. ID NOS:2-5] are preferred as they provide a means of isolating disease resistance genes having similar structural domains. ' Hybridization can be done using standard techniques such as are described in Ausubel et al., Current Protocols in Molecular Biology, John Wiley & Sons, (1989) . For example, high stringency conditions for detecting the RPS2 gene include hybridization at about 42°C, and about 50% formamide; a first wash at about 65°C, about 2X SSC, and 1% SDS; followed by a second wash at about 65°C and about 0.1% SSC. Lower stringency conditions for detecting RPS genes having about 50% sequence identity to the RPS2 gene are detected by, for example, hybridization at about 42°C in the absence of formamide; a first wash at about 42°C, about 6X SSC, and about 1% SDS; and a second wash at about 50°C, about 6X SSC, and about 1% SDS. An approximately 350 nucleotide DNA probe encoding the middle portion of the LRR region of Rps2 was used as a probe in the above example. Under lower stringency conditions, a minimum of 5 DNA bands were detected in BamHI digested Arabidopsis thaliana genomic DNA as sequences having sufficient sequence identity to hybridize to DNA encoding the middle portion of the LRR motif of Rps2. Similar results were obtained using a probe containing a 300 nucleotide portion of the RPS2 gene encoding the extreme N-terminus of Rps2 outside of the LRR motif. Isolation of other disease resistance genes is performed by PCR amplification techniques well known to those skilled in the art of molecular biology using oligonucleotide primers designed to amplify only sequences flanked by the oligonucleotides in genes having sequence identity to RPS2. The primers are optionally designed to allow cloning of the amplified product into a suitable vector. RPS2 Expression in Transgenic Plant Cells and Plants The expression of the -RPS2 gene in plants susceptible to pathogens carrying avrRpt2 is achieved by introducing into a plant a DNA sequence containing the RPS2 gene for expression of the Rps2 polypeptide. A number of vectors suitable for stable transfection of plant cells or for the establishment of transgenic plants are available to the public; such vectors are described in, e.g., Pouwels et al., Cloning Vectors : A Laboratory Manual , 1985, Supp. 1987); Weissbach and Weissbach, Methods for Plant Molecular Biology, Academic Press, 1989; and Gelvin et al. , Plant Molecular Biology Manual , Kluwer Academic Publishers, 1990. Typically, plant expression vectors include (1) one or more cloned plant genes under the transcriptional control of 5' and 3' regulatory sequences and (2) a dominant selectable marker. Such plant expression vectors may also contain, if desired, a promoter regulatory region (e.g., a regulatory region controlling inducible or constitutive, environmentally- or developmentally-regulated, or cell- or tissue-specific expression) , a transcription initiation start site, a ribosome binding site, an RNA processing signal, a transcription termination site, and/or a polyadenylation signal. An example of a useful plant promoter which could be used to express a plant resistance gene according to the invention is a caulimovirus promoter, e.g., the cauliflower mosaic virus (CaMV) 35S promoter. These promoters confer high levels of expression in most plant tissues, and the activity of these promoters is not dependent on virally encoded proteins. CaMV is a source for both the 35S and 19S promoters. In most tissues of transgenic plants, the CaMV 35S promoter is a strong promoter (see, e.g., Odel et al., Nature 313:810, (1985)). The CaMV promoter is also highly active in monocots (see, e.g., Dekeyser et al., Plant Cell 2:591, (1990); Terada and Shimamoto, Mol. Gen. Genet. 220:389, (1990)) . Other useful plant promoters include, without limitation, the nopaline synthase promoter (An et al., Plant Physiol. 88:547, (1988)) and the octopine synthase promoter (Fromm et al., Plant Cell 1:977, (1989)). For certain applications, it may be desirable to produce the RPS2 gene product or the avrRpt2 gene product in an appropriate tissue, at an appropriate level, or at an appropriate developmental time. Thus, there are a variety of gene promoters, each with its own distinct characteristics embodied in its regulatory sequences, shown to be regulated in response to the environment, hormones, and/or developmental cues. These include gene promoters that are responsible for (1) heat-regulated gene expression (see, e.g., Callis et al., Plant Physiol. 88: 965, (1988)), (2) light-regulated gene expression (e.g., the pea rbcS-3A described by Kuhlemeier et al., Plant Cell 1: 471, (1989) ; the maize rbcS promoter described by Schaffner and Sheen, Plant Cell 3: 997, (1991) ; or the cholorphyll a/b-binding protein gene found in pea described by Simpson et al., EMBO J. 4: 2723, (1985)), (3) hormone-regulated gene expression (e.g., the abscisic acid responsive sequences from the Em gene of wheat described Marcotte et al.. Plant Cell 1:969, (1989)), (4) wound-induced gene expression (e.g., of wunl described by Siebertz et al., Plant Cell 1: 961, (1989)), or (5) organ-specific gene expression (e.g., of the tuber-specific storage protein gene described by Roshal et al., EMBO J. 6:1155, (1987); the 23-kDa zein gene from maize described by Schernthaner et al., EMBO J. 7: 1249, (1988) ; or the French bean β-phaseolin gene described by Bustos et al., Plant Cell 1:839, (1989)). Plant expression vectors may also optionally include RNA processing signals, e.g, introns, which have been shown to be important for efficient RNA synthesis and accumulation (Callis et al., Genes and Dev. 1: 1183, (1987)). The location of the RNA splice sequences can influence the level of transgene expression in plants. In view of this fact, an intron may be positioned upstream or downstream of an Rps2 polypeptide-encoding sequence in the transgene to modulate levels of gene expression. In addition to the aforementioned 5' regulatory control sequences, the expression vectors may also include regulatory control regions which are generally present in the 3' regions of plant genes (Thornburg et al., Proc. Natl Acad. Sci USA 84: 744, (1987); An et al.. Plant Cell 1: 115, (1989)). For example, the 3' terminator region may be included in the expression vector to increase stability of the mRNA. One such terminator region may be derived from the PI-II terminator region of potato. In addition, other commonly used terminators are derived from the octopine or nopaline synthase signals. The plant expression vector also typically contains a dominant selectable marker gene used to identify the cells that have become transformed. Useful selectable marker genes for plant systems include genes encoding antibiotic resistance genes, for example, those encoding resistance to hygromycin, kanamycin, bleomycin, G418, streptomycin or spectinomycin. Genes required for photosynthesis may also be used as selectable markers in photosynthetic-deficient strains. Finally, genes encoding herbicide resistance may be used as selectable markers; useful herbicide resistance genes include the ar gene encoding the enzyme phosphinothricin acetyltransferase, which confers resistance to the broad spectrum herbicide Basta® (Hoechst AG, Frankfurt, Germany) . Efficient use of selectable markers is facilitated by a determination of the susceptibility of a plant cell to a particular selectable agent and a determination of the concentration of this agent which effectively kills most, if not all, of -the transformed cells. Some useful concentrations of antibiotics for tobacco transformation include, e.g., 75-100 μg/ml (kanamycin), 20-50 μg/ml (hygromycin) , or 5-10 μg/ml (bleomycin) . A useful strategy for selection of transformants for herbicide resistance is described, e.g., in Vasil I.K., Cell Culture and Somatic Cell Genetics of Plants , Vol I, II, III Laboratory Procedures and Their Applications Academic Press, New York, 1984.- It should be readily apparent to one skilled in the field of plant molecular biology that the level of gene expression is dependent not only on the combination of promoters, RNA processing signals and terminator elements, but also on how these elements are used to increase the levels of gene expression. Plant Transformation Upon construction of the plant expression vector, several standard methods are known for introduction of the recombinant genetic material into the host plant for the generation of a transgenic plant. These methods include (1) Agrobacterium-mediated transformation (A. tu efaciens or A. rhizogenes) (see, e.g., Lichtenstein and Fuller In: Genetic Engineering, vol 6, PWJ Rigby, ed, London, Academic Press, 1987; and Lichtenstein, C.P., and Draper, J, . In: DNA Gloning, Vol II, D.M. Glover, ed, Oxford, IRI Press, 1985) , (2) the particle delivery system (see, e.g., Gordon-Kamm et al., Plant Cell 2:603, (1990); or BioRad Technical Bulletin 1687, supra) , (3) microinjection protocols (see, e.g., Green et al., Plant Tissue and Cell Culture , Academic Press, New York, 1987) , (4) polyethylene glycol (PEG) procedures (see, e.g., Draper et al., Plant Cell Physiol 23:451, (1982); or e.g., Zhang and Wu, Theor. Appl. Genet. 76:835, (1988)), (5) liposome-mediated DNA uptake (see, e.g., Freeman et al., Plant Cell Physiol 25: 1353, (1984)), (6) electroporation protocols (see, e.g., Gelvin et al supra: Dekeyser et al. supra; or Fromm et al Nature 319: 791, (1986)), and (7) the vortexing method (see, e.g., Kindle, K., Proc. Natl. Acad. Sci., USA 87:1228, (1990)). The following" is an example outlining an Agrobacterium-mediated plant transformation. The general process for manipulating genes to be transferred into the genome of plant cells is carried out in two phases. First, all the cloning and DNA modification steps are done in E. coli , and the plasmid containing the gene construct of interest is transferred by conjugation into Agrobacterium . Second, the resulting Agrobacterium strain is used to transform plant cells. Thus, for the generalized plant expression vector, the plasmid contains an origin of replication that allows it to replicate in AσroJacteriu-7. and a high copy number origin of replication functional in E. coli . This permits facile production and testing of transgenes in E. coli prior to transfer to Agrobacterium for subsequent introduction into plants. Resistance genes can be carried on the vector, one for selection in bacteria, e.g., streptomycin, and the other that will express in plants, e.g., a gene encoding for kanamycin resistance or an herbicide resistance gene. Also present are restriction endonuclease sites for the addition of one or more transgenes operably linked to appropriate regulatory sequences and directional T-DNA border sequences which, when recognized by the transfer functions of Agrobacterium , delimit the region that will be transferred to the plant. In another example, plant cells may be transformed by shooting into the cell tungsten microprojectiles on which cloned DNA is precipitated. In the Biolistic Apparatus (Bio-Rad, Hercules, CA) used for the shooting, a gunpowder charge (22 caliber Power Piston Tool Charge) or an air-driven blast drives a plastic macroprojectile through a gun barrel. An aliquot of a suspension of tungsten particles on which DNA has been precipitated is placed on the front of the plastic macroprojectile. The latter is fired at an acrylic stopping plate that has a hole through it that is too small for the macroprojectile to go through. As a result, the plastic macroprojectile smashes against the stopping plate and the tungsten microprojectiles continue toward their target through the hole in the plate. For the instant invention the target can be any plant cell, tissue, seed, or embryo. The DNA introduced into the cell on the microprojectiles becomes integrated into either the nucleus or the chloroplast. Transfer and expression of transgenes in plant cells is now routine practice to those skilled in the art. It has become a major tool to carry out gene expression studies and to attempt to obtain improved plant varieties of agricultural or commercial interest. Transgenic Plant Regeneration Plant cells transformed with a plant expression vector can be regenerated, e.g., from single cells, callus tissue or leaf discs according to standard plant tissue culture techniques. It is well known in the art that various cells, tissues and organs from almost any plant can be successfully cultured to regenerate an entire plant; such techniques are described, e.g., in Vasil supra; Green et al., supra; Weissbach and Weissbach, supra: and Gelvin et al., supra. In one possible example, a vector carrying a selectable marker gene (e.g., kanamycin resistance), a cloned RPS2 gene under the control of its own promoter and terminator or, if desired, under the control of exogenous regulatory sequences such as the 35S CaMV promoter and the nopaline synthase terminator is transformed into Agrobacterium . Transformation of leaf tissue with vector-containing Agrobacterium is carried out as described by Horsch et al. (Science 227: 1229, (1985)). Putative transformants are selected after a few weeks (e.g., 3 to 5 weeks) on plant tissue culture media containing kanamycin (e.g. 100 μg/ml) . Kanamycin- resistant shoots are then placed on plant tissue culture media without hormones for root initiation. Kanamycin- resistant plants are then selected for greenhouse growth. If desired, seeds from self-fertilized transgenic plants can then be sowed in a soil-less media and grown in a greenhouse. Kanamycin-resistant progeny are selected by sowing surfaced sterilized seeds on hormone-free kanamycin-containing media. Analysis for the integration of the transgene is accomplished by standard techniques (see, e.g., Ausubel et al. supra; Gelvin et al. supra) . Transgenic plants expressing the selectable marker are then screened for transmission of the transgene DNA by standard immunoblot and DNA and RNA detection techniques. Each positive transgenic plant and its transgenic progeny are unique in comparison to other transgenic plants established with the same transgene. Integration of the transgene DNA into the plant genomic DNA is in most cases random and the site of integration can profoundly effect the levels, and the tissue and developmental patterns of transgene expression. Consequently, a number of transgenic lines are usually screened for each transgene to identify and select plants with the most appropriate expression profiles. Transgenic lines are evaluated for levels of transgene expression. Expression at the RNA level is determined initially to identify and quantitate expression-positive plants. Standard techniques for RNA analysis are employed and include PCR amplification assays using oligonucleotide primers designed to amplify only transgene RNA templates and solution hybridization assays using transgene-specific probes (see, e.g. , Ausubel et al., supra) . The RNA-positive plants are then analyzed for protein expression by Western immunoblot analysis using Rps2 polypeptide-specific antibodies (see, e.g., Ausubel et al., supra) . In addition, in situ hybridization and immunocytochemistry according to standard protocols can be done using transgene-specific nucleotide probes and antibodies, respectively, to localize sites of expression within transgenic tissue. Once the Rps2 polypeptide has been expressed in any cell or in a transgenic plant (e.g., as described above) , it can be isolated using any standard technique, e.g., affinity chromatography. In one example, an anti- Rps2 antibody (e.g., produced as described in Ausubel et al., supra. or by any standard technique) may be attached to a column and used to isolate the polypeptide. Lysis and fractionation of Rps2-producing cells prior to affinity chromatography may be performed by standard methods (see, e.g., Ausubel et al., supra) . Once isolated, the recombinant polypeptide can, if desired, be further purified, e.g., by high performance liquid chromatography (see, e.g.. Fisher, Laboratory Techniques In Biochemistry And Molecular Biology, Work and Burdon, eds., Elsevier, 1980). These general techniques of polypeptide expression and purification can also be used to produce and isolate useful Rps2 fragments or analogs. Use Introduction of RPS2 into a transformed plant cell provides for resistance to bacterial pathogens carrying the avrRpt2 avirulence gene. For example, transgenic plants of the instant invention expressing RPS2 might be used to alter, simply and inexpensively, the disease resistance of plants normally susceptible to plant pathogens carrying the avirulence gene, avrRpt2. The invention also provides for broad-spectrum pathogen resistance by mimicking the natural mechanism of host resistance. First, the RPS2 transgene is expressed in plant cells at a sufficiently high level to initiate the plant defense response constitutively in the absence of signals from the pathogen. The level of expression associated with plant; defense response initiation is determined by measuring the levels of defense response gene expression as described in Dong et al. , supra. Second, the RPS2 transgene is expressed by a controllable promoter such as a tissue-specific promoter, cell-type specific promoter or by a promoter that is induced by an external signal or agent thus limiting the temporal and tissue expression of a defense response. Finally, the RPS2 gene product is co-expressed with the avrRpt2 gene product. The RPS2 gene is expressed by its natural promoter, by a constitutively expressed promoter such as the CaMV 35S promoter, by a tissue-specific or cell-type specific promoter, or by a promoter that is activated by an external signal or agent. Co-expression of RPS2 and avrRpt2 will mimic the production of gene products associated with the initiation of the plant defense response and provide resistance to pathogens in the absence of specific resistance gene-avirulence gene corresponding pairs in the host plant and pathogen. The invention also provides for expression in plant cells of a nucleic acid having the sequence [SEQ. ID. NO:l] of Fig. 2 or the expression of a degenerate variant thereof encoding the amino acid sequence [SEQ. ID NOS:2-5] of open reading frame "a" of Fig. 2. The invention further provides for the isolation of nucleic acid sequences having about 50% or greater sequence identity to RPS2 by using the RPS2 sequence [SEQ. ID. NO:l] of Fig. 2 or a portion thereof greater than about 18 nucleic acids in length as a probe. Appropriate reduced hybridization stringency conditions are utilized to isolate DNA sequences having about 50% or greater sequence identity to the RPS2 sequence [SEQ. ID. NO: 1] of Fig. 2. The invention will provide disease resistance to plants, especially crop plants, most especially important crop plants such as tomato, pepper, maize, wheat, rice and legumes such as soybean and bean, or any plant which is susceptible to pathogens carrying an avirulence gene, e.g., the avrRpt2 avirulence gene. Such pathogens include, but are not limited to, Pseudomonas syringae strains. The invention also includes any biologically active fragment or analog of an Rps2 polypeptide. By "biologically active" is meant possessing any in vivo activity which is characteristic of the Rps2 polypeptide [SEQ. ID NOS:2-5] shown in Fig. 2. A useful Rps2 fragment or Rps2 analog is one which exhibits a biological activity in any biological assay for disease resistance gene product activity, for example, those assays described by Dong et al. (1991), supra; Yu et al. (1993) supra; and Kunkel et al. (1993) supra; and Whalen et al. (1991) . In particular, a biologically active Rps2 polypeptide fragment or analog is capable of providing substantial resistance to plant pathogens carrying the avrRpt2 avirulence gene. By substantial resistance is meant at least partial reduction in susceptibility to plant pathogens carrying the avrRpt2 gene. Preferred analogs include Rps2 polypeptides (or biologically active fragments thereof) whose sequences differ from the wild-type sequence only by conservative amino acid substitutions, for example, substitution of one amino acid for another with similar characteristics (e.g., valine for glycine, arginine for lysine, etc.) or by one or more non-conservative amino acid substitutions, deletions, or insertions which do not abolish the polypeptide 7 s biological activity. Analogs can differ from naturally occurring Rps2 polypeptide in amino acid sequence or can be modified in ways that do not involve sequence, or both. Analogs of the invention will generally exhibit at least 70%, preferably 80%, more preferably 90%, and most preferably 95% or even 99%, homology with a segment of 20 amino acid residues, preferably 40 amino acid residues, or more preferably the entire sequence of a naturally occurring Rps2 polypeptide sequence [SEQ. ID NOS:2-5]. Alterations in primary sequence include genetic variants, both natural and induced. Also included are analogs that include residues other than naturally occurring L-amino acids, e.g., D-amino acids or non- naturally occurring or synthetic amino acids, e.g., β or γ amino acids. Also included in the invention are Rps2 polypeptides modified by in vivo chemical derivatization of polypeptides, including acetylation, methylation, phosphorylation, carboxylation, or glycosylation. In addition to substantially full-length polypeptides, the invention also includes biologically active fragments of the polypeptides. As used herein, the term "fragment", as applied to a polypeptide, will ordinarily be at least 20 residues, more typically at least 40 residues, and preferably at least 60 residues in length. Fragments of Rps2 polypeptide can be generated by methods known to those skilled in the art. The ability of a candidate fragment to exhibit a biological activity of Rps2 can be assessed by those methods described herein. Also included in the invention are Rps2 polypeptides containing residues that are not required for biological activity of the peptide, e.g., those added by alternative mRNA splicing or alternative protein processing events. Other embodiments are within the following claims. SEQUENCE LISTING (1) GENERAL INFORMATION: (i) APPLICANT: Ausubel, Frederick M. Staskawicz, Brian J. Brent, Andrew F. Dahlbeck, Douglas Katagiri, Fumiaki Kunkel, Barbara N. Mindrinos, Michael N. Yu, Guo-Liang (ii) TITLE OF INVENTION: RPS2 GENE AND USES THEREOF (iii) NUMBER OF SEQUENCES: 106 (iv) CORRESPONDENCE ADDRESS: (A) ADDRESSEE: Fish & Richardson (B) STREET: 225 Franklin Street Suite 3100 (C) CITY: Boston (D) STATE: MA (E) COUNTRY: USA (F) ZIP: 02110-2904 (v) COMPUTER READABLE FORM: (A) MEDIUM TYPE: Floppy disk (B) COMPUTER: IBM PC compatible (C) OPERATING SYSTEM: PC-DOS/MS-DOS (D) SOFTWARE: Patentln Release #1.0, Version #1.30B (vi) CURRENT APPLICATION DATA: (A) APPLICATION NUMBER: US 08/227,360 (B) FILING DATE: 13-APR-1994 (C) CLASSIFICATION: (viii) ATTORNEY/AGENT INFORMATION: (A) NAME: Clark, Paul T. (B) REGISTRATION NUMBER: 30,162 (C) REFERENCE/DOCKET NUMBER: 00786/230001 (ix) TELECOMMUNICATION INFORMATION: (A) TELEPHONE: (617) 542-5070 (B) TELEFAX: (617)- 542-8906 (C) TELEX: 100254 (2) INFORMATION FOR SEQ ID Nθ:l: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2903 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: DNA (genomic) (xi) SEQUENCE DESCRIPTION: SEQ ID N0:1: AAGTAAAAGA AAGAGCGAGA AATCATCGAA ATGGATTTCA TCTCATCTCT TATCGTTGGC 60 TGTGCTCAGG TGTTGTGTGA ATCTATGAAT ATGGCGGAGA GAAGAGGACA TAAGACTGAT 120 CTTAGACAAG CCATCACTGA TCTTGAAACA GCCATCGGTG ACTTGAAGGC CATACGTGAT 180 GACCTGACTT TACGGATCCA ACAAGACGGT CTAGAGGGAC GAAGCTGCTC AAATCGTGCC 240 AGAGAGTGGC TTAGTGCGGT GCAAGTAACG GAGACTAAAA CAGCCCTACT TTTAGTGAGG 300 TTTAGGCGTC GGGAACAGAG GACGCGAATG AGGAGGAGAT ACCTCAGTTG TTTCGGTTGT 360 GCCGACTACA AACTGTGCAA GAAGGTTTCT GCCATATTGA AGAGCATTGG TGAGCTGAGA 420 GAACGCTCTG AAGCTATCAA AACAGATGGC GGGTCAATTC AAGTAACTTG TAGAGAGATA 480 CCCATCAAGT CCGTTGTCGG AAATACCACG ATGATGGAAC AGGTTTTGGA ATTTCTCAGT 540 GAAGAAGAAG AAAGAGGAAT CATTGGTGTT TATGGACCTG GTGGGGTTGG GAAGACAACG 600 TTAATGCAGA GCATTAACAA CGAGCTGATC ACAAAAGGAC ATCAGTATGA TGTACTGATT 660 TGGGTTCAAA TGTCCAGAGA ATTCGGCGAG TGTACAATTC AGCAAGCCGT TGGAGCACGG 720 TTGGGTTTAT CTTGGGACGA GAAGGAGACC GGCGAAAACA GAGCTTTGAA GATATACAGA 780 GCTTTGAGAC AGAAACGTTT CTTGTTGTTG CTAGATGATG TCTGGGAAGA GATAGACTTG 840 GAGAAAACTG GAGTTCCTCG ACCTGACAGG GAAAACAAAT GCAAGGTGAT GTTCACGACA 900 CGGTCTATAG CATTATGCAA CAATATGGGT GCGGAATACA AGTTGAGAGT GGAGTTTCTG 960 GAGAAGAAAC ACGCGTGGGA GCTGTTCTGT AGTAAGGTAT GGAGAAAAGA TCTTTTAGAG 1020 TCATCATCAA TTCGCCGGCT CGCGGAGATT ATAGTGAGTA AATGTGGAGG ATTGCCACTA 1080 GCGTTGATCA CTTTAGGAGG AGCCATGGCT CATAGAGAGA CAGAAGAAGA GTGGATCCAT 1140 GCTAGTGAAG TTCTGACTAG ATTTCCAGCA GAGATGAAGG GTATGAACTA TGTATTTGCC 1200 CTTTTGAAAT TCAGCTACGA CAACCTCGAG AGTGATCTGC TTCGGTCTTG TTTCTTGTAC 1260 TGCGCTTTAT TCCCAGAAGA ACATTCTATA GAGATCGAGC AGCTTGTTGA GTACTGGGTC 1320 GGCGAAGGGT TTCTCACCAG CTCCCATGGC GTTAACACCA TTTACAAGGG ATATTTTCTC 1380 ATTGGGGATC TGAAAGCGGC ATGTTTGTTG GAAACCGGAG ATGAGAAAAC ACAGGTGAAG 1440 ATGCATAATG TGGTCAGAAG CTTTGCATTG TGGATGGCAT CTGAACAGGG GACTTATAAG 1500 GAGCTGATCC TAGTTGAGCC TAGCATGGGA CATACTGAAG CTCCTAAAGC AGAAAACTGG 1560 CGACAAGCGT TGGTGATCTC ATTGTTAGAT AACAGAATCC AGACCTTGCC TGAAAAACTC 1620 ATATGCCCGA AACTGACAAC ACTGATGCTC CAACAGAACA GCTCTTTGAA GAAGATTCCA 1680 ACAGGGTTTT TCATGCATAT GCCTGTTCTC AGAGTCTTGG ACTTGTCGTT CACAAGTATC 1740 ACTGAGATTC CGTTGTCTAT CAAGTATTTG GTGGAGTTGT ATCATCTGTC TATGTCAGGA 1800 ACAAAGATAA GTGTATTGCC ACAGGAGCTT GGGAATCTTA GAAAACTGAA GCATCTGGAC 1860 CTACAAAGAA CTCAGTTTCT TCAGACGATC CCACGAGATG CCATATGTTG GCTGAGCAAG 1920 CTCGAGGTTC TGAACTTGTA CTACAGTTAC GCCGGTTGGG AACTGCAGAG CTTTGGAGAA 1980 GATGAAGCAG AAGAACTCGG ATTCGCTGAC TTGGAATACT TGGAAAACCT AACCACACTC 2040 GGTATCACTG TTCTCTCATT GGAGACCCTA AAAACTCTCT TCGAGTTCGG TGCTTTGCAT 2100 AAACATATAC AGCATCTCCA CGTTGAAGAG TGCAATGAAC TCCTCTACTT CAATCTCCCA 2160 TCACTCACTA ACCATGGCAG GAACCTGAGA AGACTTAGCA TTAAAAGTTG CCATGACTTG 2220 GAGTACCTGG TCACACCCGC AGATTTTGAA AATGATTGGC TTCCGAGTCT AGAGGTTCTG 2280 ACGTTACACA GCCTTCACAA CTTAACCAGA GTGTGGGGAA ATTCTGTAAG CCAAGATTGT 2340 CTGCGGAATA TCCGTTGCAT AAACATTTCA CACTGCAACA AGCTGAAGAA TGTCTCATGG 2400 GTTCAGAAAC TCCCAAAGCT AGAGGTGATT GAACTGTTCG ACTGCAGAGA GATAGAGGAA 2460 TTGATAAGCG AACACGAGAG TCCATCCGTC GAAGATCCAA CATTGTTCCC AAGCCTGAAG 2520 ACCTTGAGAA CTAGGGATCT GCCAGAACTA AACAGCATCC TCCCATCTCG ATTTTCATTC 2580 CAAAAAGTTG AAACATTAGT CATCACAAAT TGCCCCAGAG TTAAGAAACT GCCGTTTCAG 2640 GAGAGGAGGA CCCAGATGAA CTTGCCAACA GTTTATTGTG AGGAGAAATG GTGGAAAGCA 2700 CTGGAAAAAG ATCAACCAAA CGAAGAGCTT TGTTATTTAC CGCGCTTTGT TCCAAATTGA 2760 TATAAGAGCT AAGAGCACTC TGTACAAATA TGTCCATTCA TAAGTAGCAG GAAGCCAGGA 2820 AGGTTGTTCC AGTGAAGTCA TCAACTTTCC ACATAGCCAC AAAACTAGAG ATTATGTAAT 2880 CATAAAAACC AAACTATCCG CGA 2903 (2) INFORMATION FOR SEQ ID NO:2: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 885 aπiino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:2: Lys Lys Glu Arg Glu lie lie Glu Met Asp Phe lie Ser Ser Leu lie 1 5 10 15 Val Gly Cys Ala Gin Val Leu Cys Glu Ser Met Asn Met Ala Glu Arg 20 25 30 Arg Gly His Lys Thr Asp Leu Arg Gin Ala lie Thr Asp Leu Arg lie 35 40 45 Gin Gin Asp Gly Leu Glu Gly Arg Ser Cys Ser Asn Arg Ala Arg Glu 50 55 60 Trp Leu Ser Ala Val Gin Val Thr Glu Thr Lys Thr Ala Leu Leu Leu 65 70 75 80 Val Arg Phe Arg Arg Arg Glu Gin Arg Thr Arg Met Arg Arg Arg Tyr 85 90 95 Leu Ser Cys Phe Gly Cys Ala Asp Tyr Lys Leu Cys Lys Lys Val Ser 100 105 110 Ala lie Leu Lys Ser lie Gly Glu Leu Arg Glu Arg Ser Glu Ala lie 115 120 125 Lys Thr Asp Gly Gly Ser lie Gin Val Thr Cys Arg Glu lie Pro lie 130 135 140 Lys Ser Val Val Gly Asn Thr Thr Met Met Glu Gin Val Leu Glu Phe 145 150 155 160 Leu Ser Glu Glu Glu Glu Arg Gly lie lie Gly Val Tyr Gly Pro Gly 165 170 175 Gly Val Gly Lys Thr Thr Leu Met Gin Ser lie Asn Asn Glu Leu lie 180 . 185 190 Thr Lys Gly His Gin Tyr Asp Val Leu lie Trp Val Gin Met Ser Arg 195 200 205 Glu Phe Gly Glu Cys Thr He Gin Gin Ala Val Gly Ala Arg Leu Gly 210 215 220 Leu Ser Trp Asp Glu Lys Glu Thr Gly Glu Asn Arg Ala Leu Lys He 225 230 235 240 Tyr Arg Ala Leu Arg Gin Lys Arg Phe Leu Leu Leu Leu Asp Asp Val 245 250 255 Trp Glu Glu He Asp Leu Glu Lys Thr Gly Val Pro Arg Pro Asp Arg 260 265 270 Glu Asn Lys Cys Lys Val Met Phe Thr Thr Arg Ser He Ala Leu Cys 275 280 285 Asn Asn Met Gly Ala Glu Tyr Lys Leu Arg Val Glu Phe Leu Glu Lys 290 295 300 Lys His Ala Trp Glu Leu Phe Cys Ser Lys Val Trp Arg Lys Asp Leu 305 310 315 320 Leu Glu Ser Ser Ser He Arg Arg Leu Ala Glu He He Val Ser Lys 325 . 330 335 Cys Gly Gly Leu Pro Leu Ala Leu He Thr Leu Gly Gly Ala Met Ala 340 345 350 His Arg Glu Thr Glu Glu Glu Trp He His Ala Ser Glu Val Leu Thr 355 360 365 Arg Phe Pro Ala Glu Met Lys Gly Met Asn Tyr Val Phe Ala Leu Leu 370 375 380 Lys Phe Ser Tyr Asp Asn Leu Glu Ser Asp Leu Leu Arg Ser Cys Phe 385 390 395 400 Leu Tyr Cys Ala Leu Phe Pro Glu Glu His Ser He Glu He Glu Gin 405 410 415 Leu Val Glu Tyr Trp Val Gly Glu Gly Phe Leu Thr Ser Ser His Gly 420 425 430 Val Asn Thr He Tyr Lys Gly Tyr Phe Leu He Gly Asp Leu Lys Ala 435 440 445 Ala Cys Leu Leu Glu Thr Gly Asp Glu Lys Thr Gin Val Lys Met His 450 455 460 Asn Val Val Arg Ser Phe Ala Leu Trp Met Ala Ser Glu Gin Gly Thr 465 470 475 480 Tyr Lys Glu Leu He Leu Val Glu Pro Ser Met Gly His Thr Glu Ala 485 490 495 Pro Lys Ala Glu Asn Trp Arg Gin Ala Leu Val He Ser Leu Leu Asp 500 505 510 Asn Arg He Gin Thr Leu Pro Glu Lys Leu He Cys Pro Lys Leu Thr 515 520 525 Thr Leu Met Leu Gin Gin Asn Ser Ser Leu Lys Lys He Pro Thr Gly 530 535 540 Phe Phe Met His Met Pro Val Leu Arg Val Leu Asp Leu Ser Phe Thr 545 550 555 560 Ser He Thr Glu He Pro Leu Ser He Lys Tyr Leu Val Glu Leu Tyr 565 . 570 575 His Leu Ser Met Ser Gly Thr Lys He Ser Val Leu Pro Gin Glu Leu 580 585 590 Gly Asn Leu Arg Lys Leu Lys His Leu Asp Leu Gin Arg Thr Gin Phe 595 600 605 Leu Gin Thr He Pro Arg Asp Ala He Cys Trp Leu Ser Lys Leu Glu 610 615 620 Val Leu Asn Leu Tyr Tyr Ser Tyr Ala Gly Trp Glu Leu Gin Ser Phe 625 630 635 640 Gly Glu Asp Glu Ala Glu Glu Leu Gly Phe Ala Asp Leu Glu Tyr Leu 645 650 655 Glu Asn Leu Thr Thr Leu Gly He Thr Val Leu Ser Leu Glu Thr Leu 660 665 670 Lys Thr Leu Phe Glu Phe Gly Ala Leu His Lys His He Gin His Leu 675 680 685 His Val Glu Glu Cys Asn Glu Leu Leu Tyr Phe Asn Leu Pro Ser Leu 690 695 700 Thr Asn His Gly Arg Asn Leu Arg Arg Leu Ser He Lys Ser Cys His 705 710 715 720 Asp Leu Glu Tyr Leu Val Thr Pro Ala Asp Phe Glu Asn Asp Trp Leu 725 730 735 Pro Ser Leu Glu Val Leu Thr Leu His Ser Leu His Asn Leu Arg Cys 740 745 750 He Asn He Ser His Cys Asn Lys Leu Lys Asn Val Ser Trp Val Gin 755 760 765 Lys Leu Pro Lys Leu Glu Val He Glu Leu Phe Asp Cys Arg Glu He 770 775 780 Glu Glu Leu He Ser Glu His Glu Ser Pro Ser Val Glu Asp Pro Thr 785 790 795 800 Leu Phe Pro Ser Leu Lys Thr Leu Arg Thr Arg Asp Leu Pro Glu Leu 805 810 815 Asn Ser He Leu Pro Ser Arg Phe Ser Phe Gin Lys Val Glu Thr Leu 820 825 830 Val He Thr Asn Cys Pro Arg Val Lys Lys Leu Pro Phe Gin Glu Arg 835 840 845 Arg Thr Gin Met Asn Leu Pro Thr Val Tyr Cys Glu Glu Lys Trp Trp 850 855 860 Lys Ala Leu Glu Lys Asp Gin Pro Asn Glu Glu Leu Cys Tyr Leu Pro 865 870 875 880 Arg Phe Val Pro Asn 885 (2) INFORMATION FOR SEQ ID NO:3: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 20 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3: Glu His Ser Val Gin He Cys Pro Phe He Ser Ser Arg Lys Pro Gly 1 5 10 15 Arg Leu Phe Gin 20 (2) INFORMATION FOR SEQ ID NO:4: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4: Ser His Gin Leu Ser Thr 1 5 (2) INFORMATION FOR SEQ ID NO:5: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5: Arg Leu Cys Asn His Lys Asn Gin Thr He Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO:6: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 28 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6: Ser Lys Arg Lys Ser Glu Lys Ser Ser Lys Trp He Ser Ser His Leu 1 5 10 15 Leu Ser Leu Ala Val Leu Arg Cys Cys Val Asn Leu 20 25 (2) INFORMATION FOR SEQ ID NO:7: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 25 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:7: He Trp Arg Arg Glu Glu Asp He Arg Leu He Leu Asp Lys Pro Ser 1 5 10 15 Leu He Leu Lys Gin Pro Ser Val Thr 20 25 (2) INFORMATION FOR SEQ ID NO:8: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:8: Arg Pro Tyr Val Met Thr 1 5 (2) INFORMATION FOR SEQ ID NO:9: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:9: Leu Tyr Gly Ser Asn Lys Thr Val 1 5 (2) INFORMATION FOR SEQ ID NO:10: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 17 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:10: Arg Asp Glu Ala Ala Gin He Val Pro Glu Ser Gly Leu Val Arg Cys 1 5 10 15 Lys (2) INFORMATION FOR SEQ ID NO:11: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:ll: Arg Arg Leu Lys Gin Pro Tyr Phe 1 5 (2) INFORMATION FOR SEQ ID NO:12: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 .amino acids (B) TYPE: amino acid (C) STRANDEDNESS: -not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:12: Gly Leu Gly Val Gly Asn Arg Gly Arg Glu 1 5 10 (2) INFORMATION FOR SEQ ID NO:13: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:13: Gly Gly Asp Thr Ser Val Val Ser Val Val Pro Thr Thr Asn Cys Ala 1 5 10 15 Arg Arg Phe Leu Pro Tyr 20 (2) INFORMATION FOR SEQ ID NO:14: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:14: Arg Ala Leu Val Ser 1 5 (2) INFORMATION FOR SEQ ID NO:15: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 15 .amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:15: Glu Asn Ala Leu Lys Leu Ser Lys Gin Met Ala Gly Gin Phe Lys 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:16: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 15 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:16: Leu Val Glu Arg Tyr Pro Ser Ser Pro Leu Ser Glu He Pro Arg 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:17: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 29 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:17: Trp Asn Arg Phe Trp Asn Phe Ser Val Lys Lys Lys Lys Glu Glu Ser 1 5 10 15 Leu Val Phe Met Asp Leu Val Gly Leu Gly Arg Gin Arg 20 25 (2) INFORMATION FOR SEQ ID NO:18: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:18: Cys Arg Ala Leu Thr Thr Ser 1 5 (2) INFORMATION FOR SEQ ID NO:19: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 9 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:19: Ser Gin Lys Asp He Ser Met Met Tyr 1 5 (2) INFORMATION FOR SEQ ID NO:20: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 36 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION': SEQ ID NO:20: Phe Gly Phe Lys Cys Pro Glu Asn Ser Ala Ser Val Gin Phe Ser Lys 1 5 10 15 Pro Leu Glu His Gly Trp Val Tyr Leu Gly Thr Arg Arg Arg Pro Ala 20 25 30 Lys Thr Glu Leu 35 (2) INFORMATION FOR SEQ ID NO:21: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:21: Arg Tyr Thr Glu Leu 1 5 (2) INFORMATION FOR SEQ ID NO:22: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:22: Asp Arg Asn Val Ser Cys Cys Cys 1 5 (2) INFORMATION FOR SEQ ID NO:23: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:23: Met Met Ser Gly Lys Arg 1 5 (2) INFORMATION FOR SEQ ID NO:24: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 17 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:24: Thr Trp Arg Lys Leu Glu Phe Leu Asp Leu Thr Gly Lys Thr Asn Ala 1 5 10 15 Arg (2) INFORMATION FOR SEQ ID NO:25: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:25: Cys Ser Arg His Gly Leu 1 5 (2) INFORMATION FOR SEQ ID NO:26: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:26: His Tyr Ala Thr He Trp Val Arg Asn Thr Ser 1 5 10 (2) INFORMATION FOR SEQ ID NO:27: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 23 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:27: Glu Trp Ser Phe Trp Arg Arg Asn Thr Arg Gly Ser Cys Ser Val Val 1 5 . 10 15 Arg Tyr Gly Glu Lys He Phe 20 (2) INFORMATION FOR SEQ ID NO:28: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:28: Ser His His Gin Phe Ala Gly Ser Arg Arg Leu 1 5 10 (2) INFORMATION FOR SEQ ID NO:29: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:29: Val Asn Val Glu Asp Cys His 1 5 (2) INFORMATION FOR SEQ ID NO:30: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 19 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION. SEQ ID NO:30: Glu Glu Pro Trp Leu He Glu Arg Gin Lys Lys Ser Gly Ser Met Leu 1 5 10 15 Val Lys Phe (2) INFORMATION FOR SEQ ID NO:31: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: * not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein ( i) SEQUENCE DESCRIPTION: SEQ ID NO:31: Leu Asp Phe Gin Gin Arg 1 5 4,2) INFORMATION FOR SEQ ID NO:32: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:32: Thr Met Tyr Leu Pro Phe 1 5 (2) INFORMATION FOR SEQ ID NO:33: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 27 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:33: Asn Ser Ala Thr Thr Thr Ser Arg Val He Cys Phe Gly Leu Val Ser 1 5 10 15 Cys Thr Ala Leu Tyr Ser Gin Lys Asn He Leu 20 25 (2) INFORMATION FOR SEQ ID NO:34: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:34: Lys Arg His Val Cys Trp Lys Pro Glu Met Arg Lys His Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO:35: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 33 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:35: Arg Ser Ser Ser Leu Leu Ser Thr Gly Ser Ala Lys Gly Phe Ser Pro 1 5 . 10 15 Ala Pro Met Ala Leu Thr Pro Phe Thr Arg Asp He Phe Ser Leu Gly 20 25 30 He (2) INFORMATION FOR SEQ ID NO:36: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:36: Arg Cys He Met Trp Ser Glu Ala Leu His Cys Gly Trp His Leu Asn 1 5 10 15 Arg Gly Leu He Arg Ser 20 (2) INFORMATION FOR SEQ ID NO:37: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 20 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:37: Leu Ser Leu Ala Trp Asp He Leu Lys Leu Leu Lys Gin Lys Thr Gly 1 5 10 15 Asp Lys Arg Trp 20 (2) INFORMATION FOR SEQ ID NO:38: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 15 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear ( ii ) MOLECULE TYPE : protein (xi ) SEQUENCE DESCRIPTION : SEQ ID NO : 38 : He Thr Glu Ser Arg Pro Cys Leu Lys Asn Ser Tyr Ala Arg Asn 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:39: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:39: Cys Ser Asn Arg Thr Ala Leu 1 5 (2) INFORMATION FOR SEQ ID NO:40: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 46 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:40: Arg Arg Phe Gin Gin Gly Phe Ser Cys He Cys Leu Phe Ser Glu Ser 1 5 10 15 Trp Thr Cys Arg Ser Gin Val Ser Leu Arg Phe Arg Cys Leu Ser Ser 20 25 30 He Trp Trp Ser Cys He He Cys Leu Cys Gin Glu Gin Arg 35 40 45 (2) INFORMATION FOR SEQ ID NO:41: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 12 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:41: Val Tyr Cys His Arg Ser Leu Gly He Leu Glu Asn 1 5 10 (2) INFORMATION FOR SEQ ID NO:42: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 21 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:42: Ser He Trp Thr Tyr Lys Glu Leu Ser Phe Phe Arg Arg Ser His Glu 1 5 10 15 Met Pro Tyr Val Gly 20 (2) INFORMATION FOR SEQ ID NO:43: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:43: Ala Ser Ser Arg Phe 1 5 (2) INFORMATION FOR SEQ ID NO:44: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 32 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 4: Thr Cys Thr Thr Val Thr Pro Val Gly Asn Cys Arg Ala Leu Glu Lys 1 5 10 15 Met Lys Gin Lys Asn Ser Asp Ser Leu Thr Trp Asn Thr Trp Lys Thr 20 25 30 (2) INFORMATION FOR SEQ ID NO:45: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 12 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:45: Pro His Ser Val Ser Leu Phe Ser His Trp Arg Pro 1 5 10 (2) INFORMATION FOR SEQ ID NO:46: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 38 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:46: Lys Leu Ser Ser Ser Ser Val Leu Cys He Asn He Tyr Ser He Ser 1 5 10 15 Thr Leu Lys Ser Ala Met Asn Ser Ser Thr Ser He Ser His His Ser 20 25 30 Leu Thr Met Ala Gly Thr 35 (2) INFORMATION FOR SEQ ID NO:47: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 27 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 7: Glu Asp Leu Ala Leu Lys Val Ala Met Thr Trp Ser Thr Trp Ser His 1 5 10 15 Pro Gin He Leu Lys Met He Gly Phe Arg Val 20 25 (2) INFORMATION FOR SEQ ID NO:48: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:48: .Arg Tyr Thr Ala Phe Thr Thr 1 5 (2) INFORMATION FOR SEQ ID NO:49: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: ' not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:49: Pro Glu Cys Gly Glu He Leu 1 5 (2) INFORMATION FOR SEQ ID NO:50: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:50: Phe Arg Asn Ser Gin Ser 1 5 (2) INFORMATION FOR SEQ ID NO:51: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi ) SEQUENCE DESCRIPTION: SEQ ID NO: 51 : Ala Lys He Val Cys Gly He Ser Val Ala 1 5 10 (2) INFORMATION FOR SEQ ID NO:52: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:52: Thr Phe His Thr Ala Thr Ser 1 5 (2) INFORMATION FOR SEQ ID NO:53: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:53: Leu Asn Cys Ser Thr Ala Glu Arg 1 5 (2) INFORMATION FOR SEQ ID NO:54: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 16 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:54: Ala Asn Thr Arg Val His Pro Ser Lys He Gin His Cys Ser Gin Ala 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:55: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:55: Glu Leu Gly He Cys Gin Asn 1 5 (2) INFORMATION FOR SEQ ID NO:56: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 15 a ino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:56: Thr Ala Ser Ser His Leu Asp Phe His Ser Lys Lys Leu Lys His 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:57: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 19 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:57: Ser Ser Gin He Ala Pro Glu Leu Arg Asn Cys Arg Phe Arg Arg Gly 1 5 10 15 Gly Pro Arg (2) INFORMATION FOR SEQ ID NO:58: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 47 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:58: Thr Cys Gin Gin Phe He Val Arg Arg Asn Gly Gly Lys His Trp Lys 1 5 10 15 Lys He Asn Gin Thr Lys Ser Phe Val He Tyr Arg Ala Leu Phe Gin 20 25 30 He Asp He Arg Ala Lys Ser Thr Leu Tyr Lys Tyr Val His Ser 35 40 45 (2) INFORMATION FOR SEQ ID NO:59: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 33 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:59: Val Ala Gly Ser Gin Glu Gly Cys Ser Ser Glu Val He Asn Phe Pro 1 5 10 15 His Ser His Lys Thr Arg Asp Tyr Val He He Lys Thr Lys Leu Ser 20 25 30 Ala (2) INFORMATION FOR SEQ ID NO:60: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 25 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:60: Val Lys Glu Arg Ala Arg' Asn His Arg Asn Gly Phe His Leu He Ser 1 5 10 15 Tyr Arg Trp Leu Cys Ser Gly Val Val 20 25 (2) INFORMATION FOR SEQ ID NO:61: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear ( ii ) MOLECULE TYPE : protein (xi ) SEQUENCE DESCRIPTION : SEQ ID NO: 61 : He Tyr Glu Tyr Gly Gly Glu Lys Arg Thr 1 5 10 (2) INFORMATION FOR SEQ ID NO:62: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 .amino acids (B) TYPE: amino acid (C) STRANDEDNESS: .not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:62: Leu Glu Gly His Thr 1 5 (2) INFORMATION FOR SEQ ID NO:63: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 23 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:63: Pro Asp Phe Thr Asp Pro Thr Arg Arg Ser Arg Gly Thr Lys Leu Leu 1 5 10 15 Lys Ser Cys Gin Arg Val Ala 20 (2) INFORMATION FOR SEQ ID NO:64: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:64: Cys Gly Ala Ser Asn Gly Asp 1 5 (2) INFORMATION FOR SEQ ID NO:65: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:65: Asn Ser Pro Thr Phe Ser Glu Val 1 5 (2) INFORMATION FOR SEQ ID NO:66: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 35 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:66: Ala Ser Gly Thr Glu Asp Ala Asn Glu Glu Glu He Pro Gin Leu Phe 1 5 10 15 Arg Leu Cys Arg Leu Gin Thr Val Gin Glu Gly Phe Cys His He Glu 20 25 30 Glu His Trp 35 (2) INFORMATION FOR SEQ ID NO:67: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:67: Ala Glu Arg Thr Leu 1 5 (2) INFORMATION FOR SEQ ID NO:68: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 13 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:68: Ser Tyr Gin Asn Arg Trp Arg Val Asn Ser Ser Asn Leu 1 5 10 (2) INFORMATION FOR SEQ ID NO:69: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:69: Arg Asp Thr His Gin Val Arg Cys Arg Lys Tyr His Asp Asp Gly Thr 1 5 10 15 Gly Phe Gly He Ser Gin 20 (2) INFORMATION FOR SEQ ID NO:70: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:70: Arg Arg Arg Lys Arg Asn His Trp Cys Leu Trp Thr Trp Trp Gly Trp 1 5 10 15 Glu Asp Asn Val Asn Ala Glu His 20 (2) INFORMATION FOR SEQ ID NO:71: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:71: Gin Arg Ala Asp His Lys Arg Thr Ser Val 1 5 10 (2) INFORMATION FOR SEQ ID NO:72: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 55 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:72: Cys Thr Asp Leu Gly Ser Asn Val Gin Arg He Arg Arg Val Tyr Asn 1 5 10 15 Ser Ala Ser Arg Trp Ser Thr Val Gly Phe He Leu Gly Arg Glu Gly 20 25 30 Asp Arg Arg Lys Gin Ser Phe Glu Asp He Gin Ser Phe Glu Thr Glu 35 40 45 Thr Phe Leu Val Val Ala Arg 50 55 (2) INFORMATION FOR SEQ ID NO:73: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 15 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:73: Cys Leu Gly Arg Asp Arg Leu Gly Glu Asn Trp Ser Ser Ser Thr 1 5 10 15 (2) INFORMATION FOR SEQ ID NO:74: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 9 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:74: Arg Asp Arg Arg Arg Val Asp Pro Cys 1 5 (2) INFORMATION FOR SEQ ID NO:75: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 41 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:75: Gin Gly Lys Gin Met Gin Gly Asp Val His Asp Thr Val Tyr Ser He 1 5 10 15 Met Gin Gin Tyr Gly Cys Gly He Gin Val Glu Ser Gly Val Ser Gly 20 25 30 Glu Glu Thr Arg Val Gly Ala Val Leu 35 40 (2) INFORMATION FOR SEQ ID NO:76: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 21 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:76: Gly Met Glu Lys Arg Ser Phe Arg Val He He Asn Ser Pro Ala Arg 1 5 10 15 Gly Asp Tyr Ser Glu 20 (2) INFORMATION FOR SEQ ID NO:77: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 17 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:77: Met Trp Arg He Ala Thr Ser Val Asp His Phe Arg Arg Ser His Gly 1 5 10 15 Ser (2) INFORMATION FOR SEQ ID NO:78: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTIQN: SEQ ID NO:78: He Ser Ser Arg Asp Glu Gly Tyr Glu Leu Cys He Cys Pro Phe Glu 1 5 10 15 He Gin Leu Arg Gin Pro Arg Glu 20 (2) INFORMATION FOR SEQ ID NO:79: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:79: Ser Ala Ser Val Leu Phe Leu Val Leu Arg Phe He Pro Arg Arg Thr 1 5 10 15 Phe Tyr Arg Asp Arg Ala Ala Cys 20 (2) INFORMATION FOR SEQ ID NO:80: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:80: Val Leu Gly Arg Arg Arg Val Ser His Gin Leu Pro Trp Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO-.81: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:81: His His Leu Gin Gly He Phe Ser His Trp Gly Ser Glu Ser Gly Met 1 5 10 15 Phe Val Gly Asn Arg Arg 20 (2) INFORMATION FOR SEQ ID NO:82: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:82: Glu Asn Thr Gly Glu Asp Ala 1 5 (2) INFORMATION FOR SEQ ID NO:83: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 43 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:83: Lys Thr His Met Pro Glu Thr Asp Asn Thr Asp Ala Pro Thr Glu Gly 1 5 10 15 Leu Phe Glu Glu Asp Ser Asn Arg Val Phe His Ala Tyr Ala Cys Ser 20 25 30 Gin Ser Leu Gly Leu Val Val His Lys Tyr His 35 40 (2) INFORMATION FOR SEQ ID NO:84: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:84: Cys Gly Gin Lys Leu Cys He Val Asp Gly He 1 5 10 (2) INFORMATION FOR SEQ ID NO:85: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:85: Gly Ala Asp Pro Ser 1 5 (2) INFORMATION FOR SEQ ID NO:86: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:86: Ser Arg Lys Leu Ala Thr Ser Val Gly Asp Leu He Val Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO:87: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:87: Gin Asn Pro Asp Leu Ala 1 5 (2) INFORMATION FOR SEQ ID NO:88: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 31 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:88: Asp Ser Val Val Tyr Gin Val Phe Gly Gly Val Val Ser Ser Val Tyr 1 5 10 15 Val Arg Asn Lys Asp Lys Cys He Ala Thr Gly Ala Trp Glu Ser 20 25 30 (2) INFORMATION FOR SEQ ID NO:89: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 47 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:89: Lys Thr Glu Ala Ser Gly Pro Thr Lys Asn Ser Val Ser Ser Asp Asp 1 5 10 15 Pro Thr Arg Cys His Met Leu Ala Glu Gin Ala Arg Gly Ser Glu Leu 20 " 25 30 Val Leu Gin Leu Arg Arg Leu Gly Thr Ala Glu Leu Trp Arg Arg 35 40 45 (2) INFORMATION FOR SEQ ID NO:90: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:90: Ser .Arg Arg Thr Arg He Arg 1 5 (2) INFORMATION FOR SEQ ID NO:91: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 30 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:91: Leu Gly He Leu Gly Lys Pro Asn His Thr Arg Tyr His Cys Ser Leu 1 5 10 15 He Gly Asp Pro Lys Asn Ser Leu Arg Val Arg Cys Phe Ala 20 25 30 (2) INFORMATION FOR SEQ ID NO:92: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:92: Thr Tyr Thr Ala Ser Pro Arg 1 5 (2) INFORMATION FOR SEQ ID NO:93: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:93: Thr Pro Leu Leu Gin Ser Pro He Thr His 1 5 10 (2) INFORMATION FOR SEQ ID NO:94: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino aσid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:94: Pro Trp Gin Glu Pro Glu Lys Thr 1 5 (2) INFORMATION FOR SEQ ID NO:95: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:95: Leu Gly Val Pro Gly His Thr Arg Arg Phe 1 5 10 (2) INFORMATION FOR SEQ ID NO:96: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 58 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:96: Leu Ala Ser Glu Ser Arg Gly Ser Asp Val Thr Gin Pro Ser Gin Leu 1 5 10 15 Asn Gin Ser Val Gly Lys Phe Cys Lys Pro Arg Leu Ser Ala Glu Tyr 20 25 30 Pro Leu His Lys His Phe Thr Leu Gin Gin Ala Glu Glu Cys Leu Met 35 • 40 45 Gly Ser Glu Thr Pro Lys Ala Arg Gly Asp 50 55 (2) INFORMATION FOR SEQ ID NO:97: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 33 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:97: Thr Val Arg Leu Gin Arg Asp Arg Gly He Asp Lys Arg Thr Arg Glu 1 5 10 15 Ser He Arg Arg Arg Ser Asn He Val Pro Lys Pro Glu Asp Leu Glu 20 25 30 Asn (2) INFORMATION FOR SEQ ID NO:98: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 18 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear ( ii ) MOLECULE TYPE : protein (xi ) SEQUENCE DESCRIPTION: SEQ ID NO: 98 : Gly Ser Ala Arg Thr Lys Gin His Pro Pro He Ser He Phe He Pro 1 5 10 15 Lys Ser (2) INFORMATION FOR SEQ ID NO:99: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:99: Asn He Ser His His Lys Leu Pro Gin Ser 1 5 10 (2) INFORMATION FOR SEQ ID NO:100: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 18 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:100: Glu Thr Ala Val Ser Gly Glu Glu Asp Pro Asp Glu Leu Ala Asn Ser 1 5 * 10 15 Leu Leu (2) INFORMATION FOR SEQ ID NO:101: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 20 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:101: GGTAGTGAGT AGAGAATAAC 20 (2) INFORMATION FOR SEQ ID NO:102: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 13 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:102: Glu Leu Arg Ala Leu Cys Thr Asn Met Ser He His Lys 1 5 10 (2) INFORMATION FOR SEQ ID NO:103: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 23 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:103: Gin Glu Ala Arg Lys Val Val Pro Val Lys Ser Ser Thr Phe His He 1 5 10 15 Ala Thr Lys Leu Glu He Met 20 (2) INFORMATION FOR SEQ ID NO:104: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein ( i) SEQUENCE DESCRIPTION: SEQ ID NO:104: Lys Pro Asn Tyr Pro Arg 1 5 (2) INFORMATION FOR SEQ ID NO:105: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1491 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: .single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: DNA (genomic) (xi) SEQUENCE DESCRIPTION: SEQ ID NO:105: ATCGATTGAT CTCTGGCTCA GTGCGAGTAG TCCATTTGAG AGCAGTCGTA GCCCCGCGTG 60 GCGCATCATG GAGCTATTTG GAATTTTCGC AGGGTTATCG ATTCGTAGTG GGAACCCATT 120 CATTGTTTGG AACCACCAAC GGACGACTTA ACAAGCTCCC CGAGGTGCAT GATGAAAATT 180 GCTCCAGTTG CCATAAATCA CAGCCCGCTC AGCAGGGAGG TCCCGTCACA CGCGGCACCC 240 ACTCAGGCAA AGCAAACCAA CCTTCAATCT GAAGCTGGCG ATTTAGATGC AAGAAAAAGT 300 AGCGCTTCAA GCCCGGAAAC CCGCGCATTA CTCGCTACTA AGACAGTACT CGGGAGACAC 360 AAGATAGAGG TTCCGGCCTT TGGAGGGTGG TTCAAAAAGA AATCATCTAA GCACGAGACG 420 GGCGGTTCAA GTGCCAACGC AGATAGTTCG AGCGTGGCTT CCGATTCCAC CGAAAAACCT 480 TTGTTCCGTC TCACGCACGT TCCTTACGTA TCCCAAGGTA ATGAGCGAAT GGGATGTTGG 540 .TATGCCTGCG CAAGAATGGT TGGCCATTCT GTCGAAGCTG GGCCTCGCCT AGGGCTGCCG 600 GAGCTCTATG AGGGAAGGGA GGCGCOAGCT GGGCTACAAG ATTTTTCAGA TGTAGAAAGG 660 TTTATTCACA ATGAAGGATT AACTCGGGTA GACCTTCCAG ACAATGAGAG ATTTACACAC 720 GAAGAGTTGG GTGCACTGTT GTATAAGCAC GGGCCGATTA TATTTGGGTG GAAAACTCCG 780 AATGACAGCT GGCACATGTC GGTCCTCACT GGTGTCGATA AAGAGACGTC GTCCATTACT 840 TTTCACGATC CCCGACAGGG GCCGGACCTA GCAATGCCGC TCGATTACTT TAATCAGCGA 900 TTGGCATGGC AGGTTCCACA CGCAATGCTC TACCGCTAAG TAGCAGGGTA TCTTCACGTG 960 GCGGCATCAT GACAAGCCCA TGATGCCGCC AGCAGCTACC TGAATGCCGT CTGGCTTTTT 1020 GGTCCCTATT GTCGTATCCG GAAGATGACG TCAAAGAATC TCGGCAAGAG CTTTCTTGCT 1080 CGACTCCTCA GCTTCCGGAT CGATCAGGTC GCTTGCCAGA GCGCGCTTGT CCATGAGCAT 1140 CTGCCACAGC TGCTGGTCGA TGGTGTCCTC AGCTAAAGGG ATTTTGACGA CAACCATGCG 1200 CAACTGCCCG TTGCGATACG CTCGATCCTG AAGCCCCGGT GTCCATGGCA GCCCCAAGAA 1260 AAAGACATAG TTCGCCGCTG TGAGGTTGTA GCCTGTGCCG GCGGCCGACC TGGTCCCGAT 1320 AAACACCCTG CAGTCCGGAT CCTGCTGGAA AGCATCAATC GCCTTCTGCC GCTTCTTGGG 1380 CGAGTCACTG CCCACCAACG TCACGCACCC GACGCCAAGC TTGAGGCAGT GCTCCCGCAA 1440 CGTGGCCACG GATTCCTGAT ACTCGCAGAA GAGGATCACC TTGTCGTCGA C 1491 (2) INFORMATION FOR SEQ ID NO:106: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 255 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: not relevant (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:106: Met Lys He Ala Pro Val Ala He Asn His Ser Pro Leu Ser Arg Glu 1 5 10 15 Val Pro Ser His Ala Ala Pro Thr Gin Ala Lys Gin Thr Asn Leu Gin 20 • 25 30 Ser Glu Ala Gly Asp Leu Asp Ala Arg Lys Ser Ser Ala Ser Ser Pro 35 40 45 Glu Thr Arg Ala Leu Leu Ala Thr Lys Thr Val Leu Gly Arg His Lys 50 55 60 He Glu Val Pro Ala Phe Gly Gly Trp Phe Lys Lys Lys Ser Ser Lys 65 70 75 80 His Glu Thr Gly Gly Ser Ser Ala Asn Ala Asp Ser Ser Ser Val Ala 85 90 95 Ser Asp Ser Thr Glu Lys Pro Leu Phe Arg Leu Thr His Val Pro Tyr 100 105 110 Val Ser Gin Gly Asn Glu Arg Met Gly Cys Trp Tyr Ala Cys Ala Arg 115 120 125 Met Val Gly His Ser Val Glu Ala Gly Pro Arg Leu Gly Leu Pro Glu 130 135 140 Leu Tyr Glu Gly Arg Glu Ala Pro Ala Gly Leu Gin Asp Phe Ser Asp 145 150 155 160 Val Glu Arg Phe He His Asn Glu Gly Leu Thr Arg Val Asp Leu Pro 165 * 170 175 Asp Asn Glu Arg Phe Thr His Glu Glu Leu Gly Ala Leu Leu Tyr Lys 180 185 190 His Gly Pro He He Phe Gly Trp Lys Thr Pro Asn Asp Ser Trp His 195 200 205 Met Ser Val Leu Thr Gly Val Asp Lys Glu Thr Ser Ser He Thr Phe 210 215 220 His Asp Pro Arg Gin Gly Pro Asp Leu Ala Met Pro Leu Asp Tyr Phe 225 230 235 240 Asn Gin Arg Leu Ala Trp Gin Val Pro His Ala Met Leu Tyr Arg 245 250 255 What is claimed is:

Claims: Claims 1. Substantially pure DNA encoding an Rps polypeptide. 2. The DNA of claim 1, wherein said DNA contains the RPS2 gene [SEQ. ID. N0:1]. 3. The DNA of claim 1, wherein said DNA is genomic DNA. 4. The DNA of claim 1, wherein said DNA is cDNA. 5. The DNA of claim 1, wherein said DNA is of a plant of the genus Arabidopsis . 6. Substantially pure DNA having the sequence [SEQ. ID NO:l] of Fig. 2, or degenerate variants thereof, and encoding the amino acid sequence [SEQ. ID NOS:2-5] of open reading frame "a" of Fig. 2. 7. Substantially pure DNA having about 50% or greater sequence identity to the DNA sequence [SEQ. ID. NO:l] of Fig. 2. 8. The DNA of claim 1 or 2, wherein said DNA is operably linked to regulatory sequences for expression of said polypeptide; and wherein said regulatory sequences comprise a promoter. 9. The DNA of claim 8, wherein said promoter is a constitutive promoter. 10. The DNA of claim 8, wherein said promoter is inducible by one or more external agents. 11. The DNA of claim 8, wherein said promoter is cell-type specific. 12. A cell which contains the DNA of claim 1. 13. The cell of claim 12, said cell being a plant cell. 14. The plant cell of claim 13, said plant cell being resistant to disease caused by a plant pathogen carrying an avirulence gene generating a signal recognized by an Rps polypeptide. 15. The plant cell of claim 14, said plant pathogen carrying an avrRpt2 gene. 16. The plant cell of claim 14, said plant cell being from the group of plants comprising Arabidopsis , tomato, soybean, bean, maize, wheat, and rice. 17. The plant cell of claim 14, said plant pathogen being Pseudomonas syringae . 18. The plant cell of claim 13, wherein said plant cell further contains an avrRpt2 gene operably linked to regulatory sequences; and wherein said regulatory sequences comprise a promoter. 19. The plant cell of claim 18, wherein said promoter is a constitutive promoter. 20. The plant cell of claim 18, wherein said promoter is inducible by one or more external agents. 21. The plant cell of claim 18, wherein said promoter is cell-typQ specific. 22. A transgenic plant which contains the DNA of claim 1 integrated into the genome of said plant, wherein said DNA is expressed in said transgenic plant. 23. A transgenic plant which contains the DNA of claim 8 integrated into the genome of said plant, wherein said DNA is expressed in said transgenic plant. 24. A transgenic plant generated from the plant cell of claim 18 wherein said DNA and said avrRpt2 gene are expressed in said transgenic plant. 25. A seed from a transgenic plant of claim 22. 26. A seed from a transgenic plant of claim 23. 27. A seed from a transgenic plant of claim 24. 28. A cell from a transgenic plant of claim 22. 29. A cell from a transgenic plant of claim 23. 30. A method, of providing resistance to a plant pathogen in a plant, said method comprising: producing a transgenic plant cell comprising the DNA of claim 1 integrated into the genome of said transgenic plant cell and positioned for expression in said plant cell; and growing a transgenic plant from said plant cell wherein said DNA is expressed in said transgenic plant. 31. A method of detecting a resistance gene in a plant cell, said method comprising: contacting the DNA of claim 1 or a portion thereof greater than about 18 nucleic acids in length with a preparation of genomic DNA from said plant cell under hybridization conditions providing detection of DNA sequences having about 50% or greater sequence identity to the sequence [SEQ. ID. NO:1] of Fig.2. 32. A method of producing an Rps2 polypeptide comprising: providing a cell transformed with DNA encoding an Rps2 polypeptide positioned for expression in said cell; culturing said transformed cell under conditions for expressing said DNA; and isolating said Rps2 polypeptide. 33. A method of providing, in a transgenic plant, resistance to a plant pathogen, said method comprising: producing a transgenic plant cell comprising the DNA of claim 8 integrated into the genome of said transgenic plant cell and positioned for expression in said plant cell; and growing said transgenic plant from said plant cell wherein said DNA is expressed in said transgenic plant. 34. A method of providing, in a transgenic plant, resistance to a plant pathogen, said method comprising: growing said transgenic plant from the plant cell of claim 18 wherein said DNA and said avrRpt2 gene are expressed in said transgenic plant. 35. A method of isolating a disease resistance gene or portion thereof in plants having sequence identity to RPS2, [SEQ. ID N0:1] said method comprising: amplifying by PCR said disease resistance gene or portion thereof using oligonucleotide primers wherein said primers (a) are each greater than 13 nucleotides in length; (b) each have regions of complementarity to opposite DNA strands in a region of the nucleotide sequence [SEQ. ID N0:1] of Fig. 2; and (c) optionally contain sequences capable of producing restriction enzyme cut sites in the amplified product; and isolating said disease resistance gene or portion thereof. 36. A substantially pure Rps2 polypeptide. 37. The polypeptide of claim 32, comprising an amino acid sequence substantially identical to an amino acid sequence [SEQ. ID NOS:2-5] shown in Fig. 2. 38. A vector comprising the DNA of claim 1, said vector being capable of directing expression of the peptide encoded by said DNA in a vector-containing cell. 39. A vector comprising the DNA of the avrRpt2 [SEQ. ID NO:105] gene operably linked to regulatory sequences wherein said regulatory sequences comprise a promoter. 40. A vector" comprising the DNA of claim 1 and the DNA of the avrRpt2 gene [SEQ. ID NO:105] operably linked to regulatory sequences wherein said regulatory sequences comprise a promoter.

Inventors: AUSUBEL FREDERICK M, BENT ANDREW F, DAHLBECK DOUGLAS, KATAGIRI FUMIAKI, KUNKEL BARBARA N, MINDRINOS MICHAEL N, STASKAWICZ BRIAN J, YU GUO-LIANG, AUSUBEL, FREDERICK, M., BENT, ANDREW, F., DAHLBECK, DOUGLAS, KATAGIRI, FUMIAKI, KUNKEL, BARBARA, N., MINDRINOS, MICHAEL, N., STASKAWICZ, BRIAN, J., YU, GUO-LIANG
Applicants: GEN HOSPITAL CORP, UNIV CALIFORNIA, THE GENERAL HOSPITAL CORPORATION, THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Application year: 1995
Main classification: C12N5
IPC codes: A01H5, C07K14, C12N5, C12N15, C12P21