FIELD: chemistry.
SUBSTANCE: proposed here is an isolated cyclic peptide, with amino acid sequence Cys-Ile-Xaa-Ser-Cys (SEQ ID NO:7); where Xaa is an amino acid residue, chosen from a group comprising Asp, Asn, Glu and Gin, and containing a disulphide bond between two Cys residues, which can be used as a selective antagonist of R-cadherin of mammals.
EFFECT: invented selective peptide-antagonists of R-cadherin can be used for inhibiting targeting of hematopoietic stem cells (HSC) on a developing vascular tree, for inhibiting cytoadherence caused by R-cadherin and inhibiting retina angiogenesis.
8 cl, 12 dwg, 7 ex
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