sh-Oligopeptide-35 SP is a single chain human peptide produced synthetically to be identical to a portion of the protein, Defensin Beta 4A and contains 25 amino acids consisting of arginine, cysteine, glutamine, glycine, isoleucine, leucine, lysine, phenylalanine, proline, threonine, tyrosine and valine. Defensin Beta 4A contains a maximum of 109 amino acids which may contain disulfide bonds and/or glycosylation. It consists of the proper sequence from the 20 standard amino acids.