on melanocyte receptors the melanotropin analogue is a superagonist , on cns melanotropin receptors involved in grooming it is equipotent to alpha-msh , and on cns receptors involved in attention , learning and memory [ nle4 , d-phe7 ] -alpha-msh may be an antagonist of endogenous melanotropin .
C0002302
alpha-msh
C0026667
melanotropin