Formulation: A crystalline solid
Formal Name: L-methionyl-L-prolyl-D-phenylalanyl-L-arginyl-D-tryptophyl-L-phenylalanyl-L-lysyl-L-prolyl-L-valinamide, acetate
Purity: ≥95%
Formula Markup: C61H87N15O9S • XC2H4O2
Formula Weight: 1206,5
Shelf life (days): 1460
Notes: Nonapeptide-1 is an antagonist of melanocortin receptor 1 (MC1R; Ki = 40 nM in COS-1 cells expressing human receptors).{45369} It is selective for MC1R over MC3R, MC4R, and MC5R (Kis = 470, 1,340, and 2,400 nM, respectively). Nonapeptide-1 inhibits cAMP accumulation and melanosome dispersion induced by α-melanocyte-stimulating hormone (α-MSH) in melanocytes with IC50 values of 2.5 and 11 nM, respectively.{45368}