since ca2+ influx was already activated at a calculated membrane potential below -70 mv , and was found to be sensitive to the dihydropyridine antagonist nifedipine ( 1 mumol/l ) , but insensitive to nickel ions ( 100 mumol/l ) , it does not meet the criteria established for t- or l-type voltage-dependent ca2+ channels .
C0012315
dihydropyridine
C0028066
nifedipine