chemiosmosis
Sign in to saveChemiosmosis is the movement of ions across a semipermeable membrane through an integral membrane protein, down their electrochemical gradient. An important example is the formation of adenosine triphosphate (ATP) by the movement of hydrogen ions (H+) through ATP synthase during cellular respiration or photophosphorylation.
Article
14 sectionsContents
- The chemiosmotic hypothesis
- Proton-motive force
- Equations
- In mitochondria
- In plants
- In prokaryotes
- Emergence of chemiosmosis
- Thermal cycling model
- External proton gradient model
- Meteoritic quinones
- See also
- References
- Further reading
- External links
Chemiosmosis is the movement of ions across a semipermeable membrane through an integral membrane protein, down their electrochemical gradient. An important example is the formation of adenosine triphosphate (ATP) by the movement of hydrogen ions (H+) through ATP synthase during cellular respiration or photophosphorylation.
thumb|right|300px|An ion gradient has potential energy and can be used to power [[chemical reactions when the ions pass through a channel (red).]]