Barley Hexapeptide-40 sh-Polypeptide-13 is a fusion peptide of Hexapeptide-40 and sh-Polypeptide-13 produced by barley plants after using either a transient expression system or transgenesis (stable insertion of a copy of a human gene into its DNA). The fusion peptide contains 211 amino acids and may contain disulfide bonds and/or glycosylation. The protein consists of the proper sequence of the 20 standard amino acids.