ac- [ cys4 , cys10 ] -alpha-msh4-12-nh2 ( iv ) was considerably more potent than the cyclic 4-11 melanotropin and was , in fact , equipotent or even slightly more potent than [ cys4 , cys10 ] -alpha-msh and ac- [ cys4 , cys10 ] -alpha-msh4-13-nh2 over the linear portion of the dose-response in all three bioassays .
C0026667
melanotropin
C0002302
alpha-msh