Which compound is being oxidized? D-GhceraldehydeSphosphate (GSP) H-C-OH CH-OPO Gheerakdehyde-3. phosphate dehsdrogenase NAD NADH + HT OPO 13kaphosphoghcerate (BPG| H-C-OH ned CH OPO 013 bisphosohoglycerate O NADH ODivceraldelyde 3-onosphate O NAD Which of the following is the active site amino acid nucleophile for the above enzyme referred to in the previous question? O lysine serine O aspartate OCysteine
Q: oxidized coenzyme
A: 1. FAD
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- The Reactions and Meehanisms of the Leloir Pathway Write the reactions that permit galactose to be utilized in glycolysis. Write a suitable mechanism, tor one of these reactions.Comparing Glycolysis Entry Points for Sucrose Sucrose can enter glycolysis by either of two routes: Sucrose phosphorylase: Sucrose + Pi fructose + glucose-1-phosphate Invertase: Sucrose + H20 fructose + glucose Would either of these reactions offer Jin advantage over the other In the preparation of hexoses fur entry into glycolysis?What if the phosphate group for the glycolysis reaction with enzyme glyceraldehyde 3-phosphate dehydrogenase was from ATP instead of Pi? What would the complete, balanced, net rxn of glycoslysisequation be and how does this impact the overall glycolysis rxn?
- The ΔG°’ for the aldolase reaction of glycolysis in muscle is +22.8 kJ/mol. Why does the aldolase reaction proceed in the direction of glyceraldehyde-3-phosphate and dihydroxyacetone phosphate during glycolysis?Pyruvate carboxylase catalyzes the first step of gluconeogenesis. ATP + HCO3─ + pyruvate → oxaloacetate + ADP + Pi ∆G0’ = ─2.1 kJ mol-1 a) Calculate ΔG for this reaction under the following physiological conditions: 370C, pH 7 [pyruvate] = [HCO3─] = 4.0 mM [oxaloacetate]= 2.0 mM [ATP] = 3.5 mM [Pi] = 5.0 mM [ADP] = 1.8 mMIn the hexokinase reaction (in glycolysis) Keq caclualtion, what is the OBVIOUS problem with getting a Keq of 678? what should keq be normally? how can you EXPLAIN a Keq of 678?
- Using the glycerol-3-phosphate shuttle, determine how many ATP can be produced from one mole of each of the following compounds on complete oxidation?a.) Mannoseb.) Dihydroxyacetone phosphatec.) Citrated.) Malatee.) Succinate3-Phosphoglycerate is a metabolite in glycolysis. Which glycolytic enzyme generates this metabolite?In Bacillus subtilis, threonine is metabolized by the following sequence of reactions: (a) oxidation; (b) decarboxylation;(c) transamination; and (d) oxidation to produce pyruvate. Outline this sequence of steps, show the structures of thesubstances, use abbreviations for the cofactors, and show any enzyme-bound coenzymes. What type of enzyme bound intermediate is likely for reaction (d)?
- The mechanism involved in the reaction catalyzed by phosphoglyceromutase is known to involve a phosphorylatedenzyme intermediate. If 3-phosphoglycerate is radioactively labeledwith 32P, the product of the reaction, 2-phosphoglycerate, does nothave any radioactive label. Design a mechanism to explain these facts.The glycolysis reaction map indicates that is also a substrate for the pentose phosphate pathway (PPP), while product of the PPP and an intermediate for glycolysis. A. \beta-D-Glucose-6-phosphate; glyceraldehyde-3-phosphate B. \alpha - D- Glucose-6-phosphate; glyceraldehyde-3- phosphate C. \alpha-D-Glucose-6-phosphate; glycerate D. \alpha-D-Glucose-6-phosphate; glycerate-3-phosphate is aRefer to Figure, which indicates ΔG for each glycolytic reaction under intracellular conditions. Assume that glyceraldehyde-3-phosphate dehydrogenase was inhibited with iodoacetate, which reacts with its active site cysteine sulfhydryl group. Which glycolytic intermediate would you expect to accumulate most rapidly, and why?