when the platelet txa2 receptor was examined with both a 125i-labelled derivative of a txa2 receptor antagonist ( [ 125i ] -pta-oh ) and a 3h-labelled txa2 agonist ( [ 3h ] u-46619 ) , the equilibrium dissociation rate constants ( kd ) and the maximal concentrations of binding sites ( bmax ) of the patient 's platelets to both ligands were within normal ranges , suggesting that the binding capacity of their txa2 receptor was normal .
C1420619
platelet txa2 receptor
C0206052
txa2 receptor