Polypeptides and methods of preparation

摘要

There are disclosed active fragments of vasoactive peptides and methods of preparation. The active fragments comprise the following amino acid sequences: (a) X-MET-ALA-VAL-X1 (b) X-MET-ALA-VAL-LYS-X1 (c) X-MET-ALA-VAL-LYS-LYS-TYR-LEU-ASN-SER-Y-LEU-Z-X1 wherein X is hydrogen, glutamyl, or pyroglutamyl, X1 is OH or NH2; Y is ILE or VAL; and Z is ASN or THR.