as found by monitoring binding of [ 3h ] wb-41-1 , the ca2+ channel inhibitors methoxyverapamil ( d600 ) , verapamil , and the nifedipine analogue yc-93 bind to two different sites in rat brain : a high-affinity site ( dissociation constant kd = 2.9 nm and binding capacity b = 360 fmol/mg of protein ) and a low-affinity site ( kd = 260 nm and b = 2700 fmol/mg of protein ) .
C0016986
methoxyverapamil
C0042523
verapamil