another antibiotic known to be an ionophore of divalent cations , a23187 , also selectively inhibited growth of the yeast on non-fermentable substrates , but did not produce the respiration-deficient mutants , neither antibiotic inhibited the energy-dependent uptake of divalent cations by yeast cells nor opened the plasma membrane for these cations .
C0007448
divalent cations
C0007447
cations