sr-(Oligopeptide-230 Heptapeptide-62 Bacteriophage phi-29 Polypeptide-1 Dipeptide-19 Hexapeptide-40) 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-Bacteriophage phi-29 Polypeptide-1, Oligopeptide-230, Heptapeptide-62, Hexapeptide-40, and Dipeptide-19. The fusion peptide contains 148 amino acids which may contain disulfide bonds and/or glycosylation and consists of the proper sequence from the 20 standard amino acids.