ouabain , which does not alter catecholamine-stimulated cellular cyclic amp , inhibits potassium influx by 50 to 70 % , does not alter potassium outflux or isoproterenol-stimulated potassium influx , but increases isoproterenol-stimulated potassium outflux .
C0007412
catecholamine
C0022245
isoproterenol