The quantum efficiency of proton pumping by the purple membrane of Halobacterium halobium.

@article{Govindjee1980TheQE,
  title={The quantum efficiency of proton pumping by the purple membrane of Halobacterium halobium.},
  author={Rajni Govindjee and Thomas G. Ebrey and Antony R. Crofts},
  journal={Biophysical journal},
  year={1980},
  volume={30 2},
  pages={231-42}
}
The quantum yield of H+ release in purple membrane (PM) sheets, and H+ uptake in phospholipid (egg phosphatidylcholine, PC) vesicles containing PM, was measured in single turnover light flashes using a pH-sensitive dye, p-nitrophenol, with rhodopsin as an actinometer. We have also calculated the ratio of H+ released per M412 formed (an unprotonated Shiff-base intermediate formed during the photocycle). In PM sheets, the quantum yield of H+ release depends on the medium. The quantum yield of… CONTINUE READING

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