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10 Cards in this Set
- Front
- Back
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proteases
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protein cleaving with a serine OH group in active site that attacks nucleophilicly the carbonyl terminal of pp
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competitive inhibition
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Vmax constant but Km (affinity) decreases; thus becomes linear
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noncompetitive inhibition
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Km constant, but Vmax decreases; maintains exponential growth
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what is the committed step of glycolysis, and how is it inhibited?
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when phosphofructinase used (PFK), and inhibited by high levels of ATP
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what is a prosthetic group and what acts like one?
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non protein covalently bonded to active site
ie. vitamins: in PDC (pyruvate dehydrogenase complex), has TPP (thiamine pyrophosphate) from VB1 |
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cofactors
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inorganic or organic necessary for enzyme function, but not direct effect
ie. coenzyme A |
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Role of Electron Carrier in cellular respiration
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generate ATP through ETC; and are responsible for most E extraction
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Role of ETC and oxidative phosphorylation (2)
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1. reoxidize electron carriers
2. store E in ATP |
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Electron Carriers conversion in H+ and ATP generated and exception
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NADH = 10H+ = 5 ATP
FADH2 = 6H+ = 3 ATP glycerol phosphate shuttle: cytosolic NADH (from glycolysis), is shuttled straight to cytochrome Q (like FADH2) |
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pH of inner mitochondrial membrane
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extremely high [H+] = low pH and impermeable to protons
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