effects of quinidine on digoxin binding to na+ , k+-adenosine triphosphatase ( atpase ) in intact cells were examined by perfusion guinea-pig langendorff preparations with digoxin and estimating the occupancy of the glycoside-binding sites on the enzyme from a reduction in the initial velocity of the atp-dependent [ 3h ] ouabain binding reaction .
C0012265
digoxin
C0007158
glycoside