BC 351 Lecture Notes - Atp Synthase, Inner Membrane, Nadh Dehydrogenase

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5 Aug 2014
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Electron transport chain: a chain of multisubunit enzymes responsible for carrying out redox reactions that allows electrons from nadh/fadh2 to be passed to oxygen, making water. Inner membrane space is p-side (positive), low ph. 2. 5 atp produced per nadh, 1. 5 atp produced per fadh2. An enzyme containing a flavin nucleotide as a prosthetic group. Can adopt a radical form, the electrons do not necessarily travel together. Can be present as fad, fadh, or fadh2. Receives and donates 2 electrons, can adopt radical form. E" fadh2 > e" fmn > e" nadh. Coenzyme q is a lipid soluble carrier that takes electrons from complex i and ii to complex iii. Ubiquinone (q) fully oxidized, semiquinone radical (qh), ubiquinol (qh2) fully reduced. Cytochromes are a family of heme containing proteins that serve as electron carriers in a number of redox processes in the cell. C-type (complex iii and a peripheral membrane protein)

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