previous photoaffinity-labeling studies with [ 3h ] azidopine , ( + ) [ 3h ] pn200-110 , and [ 3h ] lu 49888 have demonstrated that 1,4-dihydropyridines ( nifedipine-like drugs ) and phenylalkylamines ( verapamil-like drugs ) bind exclusively to the 165-kda alpha 1 subunit of skeletal muscle calcium channels .
C0012315
dihydropyridines
C0028066
nifedipine