the cell membrane depolarized and the amplitude of pd responses to [ k+ ] steps was reduced by ba2+ ( 2.10 ( -6 ) to 10 ( -3 ) mol/l ) , quinidine ( 10 ( -3 ) mol/l ) , quinine ( 10 ( -3 ) mol/l ) , rb+ ( 20 mmol/l ) , cs+ ( 20 mmol/l ) , nh4+ ( 20 mmol/l ) and tl+ ( 0.5 mmol/l ) , whereas tetraethylammonium ( tea , 20 mmol/l ) had no effect .
C0034414
quinidine
C0034417
quinine