two classes of adenosine binding sites were identified in pig ventricular sarcolemma using 5'-n- [ 3h ] ethylcarboxamideadenosine ( [ 3h ] neca ) as radioligand ( bmax = 88 fmol/mg protein , kd = 28 nm ; bmax = 7100 fmol/mg protein , kd = 730 nm ) .
C0001443
adenosine
C0050789
neca