sr-Escherichia Coli Polypeptide-1 Tripeptide-64 sr-Silkworm Polypeptide-1 sh-Polypeptide-50 Oligopeptide-144 Hexapeptide-40 is a single chain synthetic fusion peptide produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the gene from sr-Escherichia Coli Polypeptide-1, sr-Silkworm Polypeptide-1, Tripeptide-64, sh-Polypeptide-50, Oligopeptide-144 and Hexapeptide-40. The fusion peptide contains 884 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 amino acids.