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C:CHEMISTRY; METALLURGY  
 C07: ORGANIC CHEMISTRY (such compounds as the oxides, sulfides, or oxysulfides of carbon, cyanogen, phosgene, hydrocyanic acid or salts thereof C01; products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds C01B33/44; macromolecular compounds C08; dyes C09; fermentation products C12; fermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture C12P; production of organic compounds by electrolysis or electrophoresis C25B3/00, C25B7/00)  
  C07K: PEPTIDES (peptides in foodstuffs A23; obtaining protein compositions for foodstuffs, working-up proteins for foodstuffs A23J; preparations for medicinal purposes A61K; peptides containing beta-lactam rings C07D; cyclic dipeptides not having in their molecule any other peptide link than those which form their ring, e.g. piperazine-2,5-diones, C07D; ergot alkaloids of the cyclic peptide type C07D519/02; macromolecular compounds having statistically distributed amino acid units in their molecules, i.e. when the preparation does not provide for a specific; but for a random sequence of the amino acid units, homopolyamides and block copolyamides derived from amino acids C08G69/00; macromolecular products derived from proteins C08H1/00; preparation of glue or gelatine C09H; single cell proteins, enzymes C12N; genetic engineering processes for obtaining peptides C12N15/00; compositions for measuring or testing processes involving enzymes C12Q; investigation or analysis of biological material G01N33/00)  
   C07K5/00: Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof  
   C07K5/02: containing at least one abnormal peptide link  
   C07K5/0202: . . containing the structure -NH-X-X-C(=0)-, X being an optionally substituted carbon atom or a heteroatom, e.g. beta-amino acids  
   C07K5/0205: . . containing the structure -NH-(X)3-C(=0)-, e.g. statine or derivatives thereof  
   C07K5/0207: . . containing the structure -NH-(X)4-C(=0), e.g. 'isosters', replacing two amino acids  
   C07K5/021: . . containing the structure -NH-(X)n-C(=0)-, n being 5 or 6; for n > 6, classification in C07K5/06 - C07K5/10, according to the moiety having normal peptide bonds  
   C07K5/0212: . . containing the structure -N-C-N-C(=0)-, e.g. retro-inverso peptides  
   C07K5/0215: . . containing natural amino acids, forming a peptide bond via their side chain functional group, e.g. epsilon-Lys, gamma-Glu  
   C07K5/0217: . . containing the structure -C(=O)-C-N-C(=O)-N-C-C(=O)-  
   C07K5/022: . . containing the structure -X-C(=O)-(C)n-N-C-C(=O)-Y-; X and Y being heteroatoms; n being 1 or 2  
   C07K5/0222: . . . with the first amino acid being heterocyclic, e.g. Pro, Trp  
   C07K5/0225: . . containing the structure -N-C-C(=O)-N-C(=O)-C-N-  
   C07K5/0227: . . containing the (partial) peptide sequence -Phe-His-NH-(X)2-C(=0)-, e.g. Renin-inhibitors with n = 2 - 6; for n > 6 seeC07K5/06 - C07K5/10  
   C07K5/04: containing only normal peptide links  
   C07K5/06: . . Dipeptides  
   C07K5/06008: . . . with the first amino acid being neutral  
   C07K5/06017: . . . . and aliphatic  
   C07K5/06026: . . . . . the side chain containing 0 or 1 carbon atom, i.e. Gly or Ala  
   C07K5/06034: . . . . . the side chain containing 2 to 4 carbon atoms  
   C07K5/06043: . . . . . . Leu-amino acid  
   C07K5/06052: . . . . . . Val-amino acid  
   C07K5/0606: . . . . . the side chain containing heteroatoms not provided for by C07K5/06086 - C07K5/06139, e.g. Ser, Met, Cys, Thr  
   C07K5/06069: . . . . . . Ser-amino acid  
   C07K5/06078: . . . . and aromatic or cycloaliphatic  
   C07K5/06086: . . . with the first amino acid being basic  
   C07K5/06095: . . . . Arg-amino acid  
   C07K5/06104: . . . with the first amino acid being acidic  
   C07K5/06113: . . . . Asp- or Asn-amino acid  
   C07K5/06121: . . . . . the second amino acid being aromatic or cycloaliphatic  
   C07K5/0613: . . . . . . Aspartame  
   C07K5/06139: . . . with the first amino acid being heterocyclic  
   C07K5/06147: . . . . and His-amino acid; Derivatives thereof  
   C07K5/06156: . . . . and Trp-amino acid; Derivatives thereof  
   C07K5/06165: . . . . and Pro-amino acid; Derivatives thereof  
   C07K5/06173: . . . . and Glp-amino acid; Derivatives thereof  
   C07K5/06182: . . . . and Pristinamycin II; Derivatives thereof  
   C07K5/06191: . . . containing heteroatoms different from O, S, or N  
   C07K5/08: . . Tripeptides  
   C07K5/0802: . . . with the first amino acid being neutral  
   C07K5/0804: . . . . and aliphatic  
   C07K5/0806: . . . . . the side chain containing 0 or 1 carbon atoms, i.e. Gly, Ala  
   C07K5/0808: . . . . . the side chain containing 2 to 4 carbon atoms, e.g. Val, Ile, Leu  
   C07K5/081: . . . . . the side chain containing O or S as heteroatoms, e.g. Cys, Ser  
   C07K5/0812: . . . . and aromatic or cycloaliphatic  
   C07K5/0815: . . . with the first amino acid being basic  
   C07K5/0817: . . . . the first amino acid being Arg  
   C07K5/0819: . . . with the first amino acid being acidic  
   C07K5/0821: . . . with the first amino acid being heterocyclic, e.g. His, Pro, Trp  
   C07K5/0823: . . . . and Pro-amino acid; Derivatives thereof  
   C07K5/0825: . . . . and Glp-amino acid; Derivatives thereof  
   C07K5/0827: . . . containing heteroatoms different from O, S, or N  
   C07K5/10: . . Tetrapeptides  
   C07K5/1002: . . . with the first amino acid being neutral  
   C07K5/1005: . . . . and aliphatic  
   C07K5/1008: . . . . . the side chain containing 0 or 1 carbon atoms, i.e. Gly, Ala  
   C07K5/101: . . . . . the side chain containing 2 to 4 carbon atoms, e.g. Val, Ile, Leu  
   C07K5/1013: . . . . . the side chain containing O or S as heteroatoms, e.g. Cys, Ser  
   C07K5/1016: . . . . and aromatic or cycloaliphatic  
   C07K5/1019: . . . with the first amino acid being basic  
   C07K5/1021: . . . with the first amino acid being acidic  
   C07K5/1024: . . . with the first amino acid being heterocyclic  
   C07K5/1027: . . . containing heteroatoms different from O, S, or N  
   C07K5/12: . . Cyclic peptides {with only normal peptide bonds in the ring}  
   C07K5/123: . . . Tripeptides  
   C07K5/126: . . . Tetrapeptides