sr-(Staphylococcus Phage 187 Polypeptide-1 Streptococcus Suis Polypeptide-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 sr-Staphylococcus Phage 187 Polypeptide-1 and sr-Streptococcus Suis Polypeptide-1. The fusion peptide contains 247 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.