This pH4 recovery, which indicatied an active transport, failed to occur after removal of Na+ from the superfusion fluid. Ee-addition of Na+ resulted in a full pH4 recovery.

• 这个pHi恢复过程是一个H~+的主动转运,用胆碱离子取代培灌液中的Na~+可以抑制pHi的恢复,这种抑制作用是可逆的。