a radioactive photoactive dihydropyridine calcium channel blocker , [ 3h ] azidopine , was used to photoaffinity label plasma membranes of multidrug-resistant chinese hamster lung cells selected for resistance to vincristine ( dc-3f/vcrd-5l ) or actinomycin d ( dc-3f/adx ) .
C0007603
plasma membranes
C0007634
cells