sr-(Methionyl sh-Oligopeptide-2 Dipeptide-46 Oligopeptide-163 sh-Polypeptide-181) 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-2, Dipeptide-46, Oligopeptide-163, and sh-Polypeptide-181, with the initiation code for methionine. The fusion peptide contains 416 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence from the 20 standard amino acids.