BSC 310 Lecture Notes - Lecture 11: Succinic Acid, Cytochrome C Oxidase, Nadh Dehydrogenase
Document Summary
Two series of reactions- fermentation and respiration- are linked to energy conservation in chemoorganotrophs (cid:1) Fermentation- anaerobic catabolism that uses an organic compound as both electron donor and acceptor and produces atp via substrate-level phosphorylation (cid:1) Respiration- catabolic process in which a compound is oxidized with. O2 as the terminal electron acceptor, usually accompanied by atp production by oxidative phosphorylation (cid:1) Habitats that lack o2 or other electron acceptor can only conserve energy via fermentation (cid:1) (cid:1) (cid:1) Substrate-level phosphorylation- atp synthesized from energy rich intermediates during the catabolism of a fermentable substrate (cid:1) Fermentable substrate serves as both electron donor and acceptor; usually sugars (cid:1) (cid:1) (cid:1) (cid:1) One round of glycolysis yields 2 atps. The 2 nadh produced in the conversion from glyceraldehyde-3-p to. 1,3-bisphosphoglycerate are oxidized back to nad+ when pyruvate is reduced to fermentation products. This nad+ is then available for additional reactions (cid:1)