N-ethylmaliemide (NEM)-stimulated passive potassium transport in camel erythrocytes: inhibitory effects of age, furosemide, sodium fluoride and okadaic acid.

The effects of age, and the inhibitory effects of furosemide, sodium fluoride, and okadaic acid on N-ethylmaliemide (NEM)-stimulated, ouabain-resistant potassium influx were investigated in camel erythrocytes. The NEM-stimulated influx which declined with the age of erythrocytes, was partially inhibited by 2 mmol/L furosemide, 20 mmol/L sodium fluoride, and completely inhibited by 150 nM okadaic acid. The effect of all chemical inhibitors was significant if added before the NEM pretreatment.