Acetyl s-FEA's Viper Pentapeptide-1 Amide is the product obtained by the acetylation of a single chain Fea's viper peptide produced synthetically to be identical to a portion of the protein, Azemiopsin, which is found in the viper, Azemiops feae. The peptide contains 5 amino acids consisting of lysine, proline and tryptophan, in which the C-terminus is an amide. The protein consists of the proper sequence of the 20 standard amino acids.