Rapid interchange between two distinct forms of cyanobacterial photosystem II reaction-center protein D1 in response to photoinhibition.

@article{Clarke1993RapidIB,
  title={Rapid interchange between two distinct forms of cyanobacterial photosystem II reaction-center protein D1 in response to photoinhibition.},
  author={A. K. Clarke and Arto J. Soitamo and P. Gustafsson and Gunnar Oquist},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1993},
  volume={90 21},
  pages={9973-7}
}
We have studied photoinhibition of photosynthesis in the cyanobacterium Synechococcus sp. PCC 7942, which possesses two distinct forms of the photosystem II reaction-center protein D1 (D1:1 and D1:2). We report here that when cells adapted to a growth irradiance of 50 mumol.m-2.s-1 are exposed to an irradiance of 500 mumol.m-2.s-1, the normally predominant D1 form (D1:1) is rapidly replaced with the alternative D1:2. This interchange is not only complete within the first hour of photoinhibition… CONTINUE READING

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