sr-(sh-Polypeptide-4 Oligopeptide-192 Oligopeptide-193) is a single chain recombinant peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the gene from sh-Polypeptide-4, Oligopeptide-192, and Oligopeptide-193. The fusion peptide contains 188 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.