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Anoxygenic photosynthesis in bacteria

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Credit

FRANCIS LEROY & NATHAN PETIT, BIOCOSMOS / SCIENCE PHOTO LIBRARY FRANCIS LEROY & NATHAN PETIT, BIOCOSMOS / SCIENCE PHOTO LIBRARY

Caption

Animation showing the process of anoxygenic cyclic photophosphorylation in purple bacteria. This is a form of photosynthesis (the production of energy from light) that does not produce oxygen as a byproduct. Light (yellow dotted line) excites the reaction centre (dark green) in the bacterial cell membrane, causing it to donate an electron (dark blue) to plastoquinol (white oval). Plastoquinol carries the electron to the cytochrome b6f complex (light pink), which transfers the electron to plastocyanin reductase (purple sphere). This causes the movement of a proton (small white sphere) into the cell, generating a proton gradient. Plastocyanin reductase carries the electron back to the reaction centre, where it can be used again. The proton gradient created within the cell is used to drive the production of ATP (adenosine triphosphate), the molecular carrier of energy.

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Clip Properties:

  • Duration: 00:00:42.22
  • Audio: No
  • Interlaced: No
  • Capture Format: QuickTime Animation
  • Codec: Animation

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