Chemiosmosis is the diffusion of ions across a selectively-permeable membrane. More specifically, it relates to the generation of ATP by the movement of hydrogen ions across a membrane during cellular respiration.
Search for chemiosmosis in these other databases too
Definition of chemiosmosis :
Phosphorylation of ADP to ATP occurring when protons that are following a concentration gradient contact ATP synthase.
Testing the Chemiosmosis Theory
Several kinds of evidence support the chemiosmotic theory of ATP synthesis in chloroplasts.
Link to discussion of the chemiosmosis in chloroplasts.
chemiosmosis The process by which ATP is produced in the inner membrane of a mitochondrion.
Chemiosmosis, shown in Figure 4, involves more than the single enzyme of substrate-level phosphorylation. Enzymes in chemiosmotic synthesis are arranged in an electron transport chain that is embedded in a membrane.
Chemiosmosis/Photophosphorylation produces ATP
Light Independent Reaction
Summary WITH IMG!!!!!!!!!!!!!!! ...
chemiosmosis The process whereby a proton gradient and an electrochemical gradient are generated by electron transport and then used to drive ATP synthesis by oxidative phosphorylation.
Chemiosmotic hypothesis --> chemiosmosis
(Science: biochemistry cell biology) a theoretical mechanism (proposed by Mitchell) to explain energy transduction in the mitochondrion.
A cluster of several membrane proteins found in the mitochondrial cristae (and bacterial plasma membrane) that function in chemiosmosis with adjacent electron transport chains, using the energy of a hydrogen-ion concentration gradient to make ATP.
... phosphate is cut loose, ATP becomes ADP (Adenosine diphosphate; ... Adenosine diphosphate. Adenosine triphosphate (ATP) anabolic. catabolic. chemiosmosis ...
Full article ...
Photophosphorylation and oxidative phosphorylation (discussed above) both use an osmotic concentration gradient of hydrogen ions to produce ATP, therefore these two processes are often referred to as chemiosmosis.
 See also: Osmosis, Trans, ATP, Membrane, Protein
  
|
RSS
