in all systems , amiloride inhibited specific ligand binding concentration-dependently , the ki values for amiloride were about 25 , 52 , 148 and 161 microm for alpha 1- alpha 2- , beta 1- and beta 2-adrenoceptor subtypes , respectively .
C1517880
ligand binding
C0001643
beta 2-adrenoceptor