we have examined the functional properties and growth factor responsiveness of the plasma membrane na+/h+ exchanger in pluripotent p19 embryonal carcinoma ( ec ) cells and in a differentiated mesodermal derivative ( mes-1 ) by analyzing the recovery of cytoplasmic ph ( phi ) from an acute acid load under bicarbonate-free conditions .
C0007603
plasma membrane
C0010834
cytoplasmic