sr-(Methionyl Oligopeptide-91 Pentapeptide-75 sh-Polypeptide-47 Pentapeptide-75 sh-Polypeptide-168 Hexapeptide-40) is a single chain recombinant peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the genes from Oligopeptide-91, Pentapeptide-75, sh-Polypeptide-47, Pentapeptide-75, sh-Polypeptide-168, and Hexapeptide-40, with the initiation code for methionine. The fusion peptide contains 381 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.