– Involved in the regulation of melanogenesis. The binding of ASP to MC1R precludes alpha-MSH initiated signaling and thus blocks production of cAMP, leading to a down-regulation of eumelanogenesis (brown/black pigment) and thus increasing synthesis of pheomelanin (yellow/red pigment). Agouti-signaling Protein, Bovine, Recombinant (His) is expressed in Baculovirus insect cells with N-10xHis tag. The predicted molecular weight is 14.9 kDa and the accession number is Q29414.