sr-(Methionyl sh-Oligopeptide-75 sh-Polypeptide-60) is a single chain recombinant peptide produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the genes from sh-Oligopeptide-75 and sh-Polypeptide-60 with the initiation code for methionine. The fusion peptide contains 169 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence from the 20 standard amino acids.