r-(Tetrapeptide-38 Hexapeptide-40 Oligopeptide-152 sh-Polypeptide-106) is a single chain fusion peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the genes encoding for Tetrapeptide-38, Hexapeptide-40, Oligopeptide-152 and the sh-Polypeptide-106. The fusion peptide contains 493amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.