the mcd cell phi response to abrupt removal of co2/hco3 included an initial alkalinization due to rapid co2 efflux , followed by an acidification due to hco3 efflux and a gradual recovery to the resting phi of 7.24 +/- 0.06 partly due to the action of a plasma membrane h+-atpase .
C0007634
the
C0007603
plasma membrane