sr-(sh-Polypeptide-170 Dipeptide-19 Hexapeptide-40) is a single chain fusion peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the gene from sh-Polypeptide-170, Dipeptide-19, and Hexapeptide-40. The fusion peptide contains 367 amino acids which may contain disulfide bonds and/or glycosylation and consists of the proper sequence from the 20 standard amino acids.