Effects of Adenine Nucleotides on Hydrogen-Ion Transport in Chloroplasts

AUTOR(ES)

McCarty, Richard E.

RESUMO

1-10 μM ATP stimulated H+ uptake and slowed the release of H+ in the dark in chloroplasts illuminated at pH values at which photophosphorylation can occur, but not at pH 6.5. This ATP stimulation of H+ uptake was abolished by an antiserum to the chloroplast coupling factor and was reduced by the energy transfer inhibitors phlorizin and Dio-9. ATP synthesis after illumination was also enhanced by ATP. Electron flow from water to methyl viologen was inhibited by the same low concentrations of ATP.

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