sr-(Hexapeptide-40 Oligopeptide-232 sh-Oligopeptide-1) is a single chain recombinant peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the gene from Hexapeptide-40, Oligopeptide-232, and sh-Oligopeptide-1. The fusion peptide contains 88 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.