PEPTIDES

Forms

There is a limitless array of possible peptides, based on amino acid sequence, number of amino acid residues, and use of derivatives/isomers of these residues. A few peptides with well-characterized sequences that have received particular focus in the cosmetic industry are palmitoyl-lysine-threonine-threonine-lysine-serine (pal-KTTKS; Matrixyl®), acetyl-glutamate-glutamate-methionine-glutamine-arginine-arginine (Ac-EEMQRR; Argireline®), and the tripeptide copper glycine-histidine-lysine (Cu-GHK).