photophosphorylation

Examples of photophosphorylation in the following topics:

• Processes of the Light-Dependent Reactions

  • This process, called photophosphorylation, occurs in two different ways.
  • In non-cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from PSII to pump hydrogen ions from the lumen (an area of high concentration) to the stroma (an area of low concentration).
  • In cyclic photophosphorylation, cytochrome b6f uses the energy of electrons from both PSII and PSI to create more ATP and to stop the production of NADPH.

• Photoautotrophs and Photoheterotrophs

  • Photoheterotrophs produce ATP through photophosphorylation but use environmentally obtained organic compounds to build structures and other bio-molecules.

• Chemiosmosis and Oxidative Phosphorylation

  • It is also the method used in the light reactions of photosynthesis to harness the energy of sunlight in the process of photophosphorylation.

• Energy Conservation and Autotrophy in Archaea

  • This process is a form of photophosphorylation.

• Cyanobacteria

  • In anaerobic conditions, they are also able to use only PS I—cyclic photophosphorylation—with electron donors other than water (for example hydrogen sulfide), in the same way as the purple photosynthetic bacteria.

• Habitats and Energy Metabolism of Crenarchaeota

  • The energy stored in these electrochemical gradients is then converted into ATP by ATP synthase (photophosphorylation).

• Essential Nutrients for Plants

  • Light energy is converted into chemical energy during photophosphorylation in photosynthesis; and into chemical energy to be extracted during respiration.

• Nongenetic Categories for Medicine and Ecology

  • Photoheterotrophs: produce ATP through photophosphorylation but use environmentally-obtained organic compounds to build structures and other bio-molecules.