Potassium uniport and ATP synthesis in Halobacterium halobium.

  title={Potassium uniport and ATP synthesis in Halobacterium halobium.},
  author={Gerhard Wagner and Rune Hartmann and Dieter Oesterhelt},
  journal={European journal of biochemistry},
  volume={89 1},
Light-driven potassium ion uptake in Halobacterium halobium is mediated by bacteriorhodopsin. This uptake is charge-balanced by sodium ions and not by proton release. Light-induced shifts in concentrations of divalent cations were found to be negligible. The transient changes in extracellular pH (alkaline overshoot) can be understood by the concomitant processes of ATP synthesis, proton/sodium exchange and potassium uptake. The driving force of potassium ion uptake is the membrane potential, no… CONTINUE READING


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