Term
| Three phases of aerobic respiration |
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Definition
1. Mobilization of Acetyl-CoA: produce Acetyl CoA to feed into TCA cycle
2. TCA cycle: generate electrons
3. Electron transport/oxidative phosphorylation: transport releases energy stored in ATP; electrons reduce O2 to H2O |
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Term
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Definition
| Gain electrons (LEO goes GER) |
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Term
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Definition
| Loss electrons (LEO goes GER) |
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Term
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Definition
| Loss electrons (LEO goes GER) |
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Term
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Definition
| E = Eo +(RT/nF)ln(e- acceptor/e- donor) |
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Term
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Definition
| Point of 50% oxidation/reduction; at this point [e- acceptor] = [e- donor] so in Nernst, get ln(1) = 0, therefore E = Eo |
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Term
| Pyridine-linked dehydrogenases |
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Definition
Redox enzyme: NAD, NADP coenzyme. Can exist in oxidized OR reduced state.
Reduced substrate(donate e- to) + NAD+ --> oxidized substrate + NADH + H+ |
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Term
| Flavin-linked dehydrogenases |
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Definition
| Redox enzymes: FAD, FMN coenzymes. Similar mechanism to pyridine-linked, but with FAD or FMN instead. Funnel e- down chain - energy released is stored as ATP |
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Term
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Definition
| redox enzyme: Fe-porphyrin ring system |
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Term
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Definition
| Different spectra for substrates in reduced versus oxidized states - advantageous because can be monitored noninvasively |
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Term
| NAD-linked dehydrogenases |
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Definition
| function in respiration: transfer e- from substrates to O2 to generate energy |
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Term
| NADP-linked dehydrogenases |
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Definition
| transfer e- from substrates generated during catabolism to reductive biosynthetic rxns |
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Term
| Redox enzyme often containing divalent cation cofactors |
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Definition
| Pyridine-linked dehydrogenases. ie alcohol dehydrogenase has Zn2+ |
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Term
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Definition
| based on porphin structure; conjugated pi system, so e- delocalized and can move around; best for light absorption |
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Term
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Definition
| iron in center, 4 N in square planar arrangement around Fe, two other things bound above and below Fe (usually aa representing protein) |
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Term
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Definition
| cytochrome is able to transfer e- because structure allows Fe to function as either Fe2+ or Fe3+ |
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