Both phototropin 1 and 2 localize on the chloroplast outer membrane with distinct localization activity.

@article{Kong2013BothP1,
  title={Both phototropin 1 and 2 localize on the chloroplast outer membrane with distinct localization activity.},
  author={Sam-Geun Kong and Noriyuki Suetsugu and Shingo Kikuchi and Masato Nakai and Akira Nagatani and Masamitsu Wada},
  journal={Plant & cell physiology},
  year={2013},
  volume={54 1},
  pages={
          80-92
        }
}
Chloroplasts change their position to adapt cellular activities to fluctuating environmental light conditions. Phototropins (phot1 and phot2 in Arabidopsis) are plant-specific blue light photoreceptors that perceive changes in light intensity and direction, and mediate actin-based chloroplast photorelocation movements. Both phot1 and phot2 regulate the chloroplast accumulation response, while phot2 is mostly responsible for the regulation of the avoidance response. Although it has been widely… CONTINUE READING
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