Molecular Weight: 1663.8 Salt Form: TFA Purity: >96% Sequence (3-letter): Ac-Ser-Tyr-Ser-Met-Glu-His-D-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2 Sequence (1-letter): Ac-SYSMEHfRWGKPV-NH2 Storage: -20 ?C or below ?-melanocyte-stimulating hormone (MSH-?) is a hormone and neuropeptide which stimulates melanogenesis. Alpha MSH[D-Phe7] is an ?-MSH analog which is more potent than MSH-?.