ca2+ -antagonist drugs can be divided into three main classes based on their interaction with the 3h-nim binding site : class i has one site law of mass action-displacement isotherms with 3h-nim , class ii exhibits complex biphasic inhibition profiles and class iii drugs increase the affinity of 1,4 dihydropyridines for the ca2+ -channel .
C0028094
3h-nim
C0012315
dihydropyridines