these findings indicate that na ( + ) -dependent proton extrusion activity ( na ( + ) -h+ exchange ) but not na ( + ) -independent proton extrusion activity is expressed during the rapid growth phase of imcd cells , whereas the more quiescent cells express na ( + ) -independent atp-dependent proton extrusion activity and a possibly less active na ( + ) -h+ exchanger .
C0007595
growth
C0007634
cells