Please draw this out and show how they react with electron flow! TPP is also utilized in transketolase reactions in the PPP. Give a mechanism for the TPP-dependent reaction between Xylulose-5-phosphate and Ribose-5-Phosphate to yield the products of Glyceraldehyde-3-phosphate and Sedoheptulose-7-Phosphate.

Please draw this out and show how they react with electron flow! TPP is also utilized in transketolase reactions in the PPP. Give a mechanism for the TPP-dependent reaction between Xylulose-5-phosphate and Ribose-5-Phosphate to yield the products of Glyceraldehyde-3-phosphate and Sedoheptulose-7-Phosphate.

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter18: Glycolysis

Section: Chapter Questions

Problem 6P: The Reactions and Meehanisms of the Leloir Pathway Write the reactions that permit galactose to be...

See similar textbooks

Similar questions

Which one of the following regarding the chemistry of glycolysis & gluconeogenesis is FALSE? Reaction 6 of glycolysis catalyzed by glyceraldehyde-3-phosphate dehydrogenase involves oxidation & addition of a P; group. Reaction 3 of gluconeogenesis catalyzed by enolase involves hydration, the addition of water to a carbon-carbon double bond (C=C) to form an alcohol. Reaction 1 of gluconeogenesis catalyzed by pyruvate carboxylase involves decarboxylation. Reaction 9 of gluconeogenesis catalyzed by fructose-1,6-bisphosphatase involves dephosphorylation (phosphoester hydrolysis). Reaction 1 of glycolysis catalyzed by hexokinase involves phosphorylation (using ATP). O 0000
The table provides the standard reduction potential, E', for relevant half-cell reactions. Half-reaction E'° (V) Oxaloacetate² + 2H+ + 2e malate²- -0.166 Pyruvate + 2H+ + 2e → lactate -0.185 Acetaldehyde + 2H+ + 2e¯ →→→ ethanol -0.197 NAD+ + H+ + 2e--> NADH -0.320 NADP+ + H+ + 2e →→ NADPH Acetoacetate + 2H+ + 2e¯ - -0.324 B-hydroxybutyrate -0.346 Which of the reactions listed would proceed in the direction shown, under standard conditions, in the presence of the appropriate enzymes? Malate + NAD+ oxaloacetate + NADH + H+ Malate + pyruvate oxaloacetate + lactate Pyruvate + NADH + H+ lactate + NAD+ Pyruvate + p-hydroxybutyrate lactate + acetoacetate Acetaldehyde + succinate ethanol + fumerate Acetoacetate + NADH + H+ → B-hydroxybutyrate + NAD+
Show the mechanism for the acid-catalyzed formation of an [α-1,6] glycosidic linkagebetween two molecules of α-D-glucopyranose. Please sketch the structure and use arrows showing electron flow!
Consider the reaction shown. CH2OH Ex. CH2 -OH CH2- Dihydroxyacetone phosphate glyceraldehyde 3-phosphate The standard free-energy change (AG) for this reaction is 7.53 kJ mol-¹. Calculate the free-energy change (AG) for this reaction at 298 K when [dihydroxyacetone phosphate] = 0.100 M and [glyceraldehyde 3-phosphate] = 0.00300 M. AG= kJ mol-1
Based on the action of thiamine pyrophosphate in catalysis of the pyruvate dehydrogenase reaction, suggest a suitable mechanism for the fourth step in the pyruvate decarboxylase reaction in yeast:
Extending the Mechanism of Methylmalonyl-CoA Mutase to Similar Reactions Based on the mechanism for the methylmalonyl-CoA mutase (see problem 14), write reasonable mechanisms for the following reactions shown.
Examine the ActiveModel for alcohol dehydrogenase and describe the structure and function of the catalytic zinc center.
Using the ActiveModel for enoyl-CoA dehydratase, give an example of a case in which conserved residues in slightly different positions can change the catalytic rate of reaction.
The Effect of lodoacetic Acid on the Glyceraldehyde-3-P Dehydrogenase Reaction (Integrates with Chapters 4 and 14.) How might iodoacetic acid affect the glyceraldehydes-3-phosphate dehydrogenase reaction in glycolysis? Justify your answer.
Figure 27.3 illustrates the response of R (ATP-regenerating) and U (ATP-utilizing) enzymes to energy charge. a. Would hexokinase be an R enzyme or a U enzyme? Would glutamine: PRPP amidotransferase, the second enzyme in purine biosynthesis, be an R enzyme or a U enzyme? b. If energy charge = 0.5: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low? c. If energy charge = 0.95: Is the activity of hexokinase high or low? Is ribose-5-P pyrophosphokinase activity high or low?
Radiotracer Labeling of Pyruvate from Glucose Determine the anticipated location in pyruvate of labeled carbons If glucose molecules labeled (in separate experiments.) with 14C at each position of (.tie carbon skeleton proceed through the glycolytic pathway.
Distinguishing the Mechanisms of Class I and Class I Aldolases Fructose bisphosphate aldolase in animal muscle is a class 1 aldolase, which forms a Schiff base intermediate between substrate (for example. fructose-1, 6-bisphosphate or dihydroxyacetone phosphate) and a lysine at the active site (see Figure I8.12). The chemical evidence for this intermediate conies from studies with aldolase and the reducing agent sodium borohydride, NaBH4. Incubation of the enzyme with dihydroxyacetone phosphate and NaBH4 inactivates the enzyme. Interestingly, no inactivation is observed if NabH4 is added to the enzyme in the absence of substrate. Write a mechanism that explains these observations and provides evidence for the formation of a Schiff base intermediate in the aldolase reaction.