Fig. 7. The protein phosphatase inhibitor okadaic acid significantly increased membrane current initially (^*P<0.05, paired t-test), had a marginal potentiating effect on the magnitude of the hypotonic inhibition of current (^*P<0.05, paired t-test) and entirely blocked the recovery of current (^**P<0.02, paired t-test) after restoration of isosmotic solutions.