measurements of intracellular ph ( phi ) , using equilibrium distribution of benzoic acid , provide evidence for a major role of this antiport in 1 ) regulation of cytoplasmic ph , in response to an acute acid load or to varying external ph values , and 2 ) the increase in cytoplasmic ph ( by 0.2-0.3 ph unit ) upon addition of growth factors ( alpha-thrombin and insulin ) to g0/g1-arrested cells .
C0010834
cytoplasmic
C0007634
cells