25. The AG" values for the two reactions are given. 1. 2. oxaloacetate + acetyl-CoA + H₂O → citrate + COASH oxaloacetate + acetate → citrate Enzymes for reactions 1 and 2 are citrate synthase and citrate lyase, respectively. Determine the AG" for the hydrolysis of acetyl-CoA acetyl-CoA + H₂O acetate + COASH + H+ plane een isoimorfbold bns (94) opg Vp1903 9911 AG¹⁰ ? AGO = -32.2 kJ/mol AG"=-1.9 kJ/mol
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- Examine the ActiveModel for alcohol dehydrogenase and describe the structure and function of the catalytic zinc center.For myristic acid, C 13H 27CO 2H: (a) How many molecules of acetyl CoA are formed from complete β-oxidation? (b) How many cycles of β-oxidation are needed for complete oxidation?Consider the complete oxidation of one mole of arachidic acid (20:0). ___________ a. How many rounds of the β-oxidation pathway will be involved? ___________ b. How many acetyl CoA will be produced? ___________ c. How many NADH will be produced from all the rounds of the β-oxidation pathway? ___________ d. How many ATP will eventually be produced from the complete oxidation of one mole of arachidoyl CoA?
- Draw the structure of the acyl CoA formed from palmitic acid, C 15H 31CO 2H. Use this acyl CoA to write out the four steps of β-oxidation.10a) Outline the mechanism for the conversion of alpha-ketoglutarate to succinyl-CoA which is catalyzed by alpha-ketoglutarate dehydrogenase. b) Of the five steps involved with this process, which would most likely be metabolically irreversible under physiological conditions?Which of the following biochemical conversions can be carried out by the least number of proteins? Assume proper metabolic conditions, abundance of cofactors, necessary accessory molecules, etc. 1 propionyl-CoA → 1 succinyl-CoA 1 palmitate (16:0) → 8 acetyl-CoA 1 acetyl-CoA + 7 malonyl-CoA → 1 palmitate (16:0) 1 palmitate (16:0) → 1 acetyl-CoA + 1 myristic acid (14:0) 1 acetyl-CoA → 1 succinate Please answer very soon will give rating surely
- Peroxisomes have an alternative pathway for oxidizing polyunsaturated fatty acids. They contain a hydratase that converts D-3-hydroxyacyl CoA into trans Δ²- enoyl CoA. How can this enzyme be used to oxidize CoAs containing a cis double bond at an evennumbered carbon atom (e.g., the cis-Δ¹² double bond of linoleate)?Most fatty acids have an even number of carbons and, therefore, are completely metabolized to acetyl-CoA. A fatty acid with an odd number of carbonsis metabolized to acetyl-CoA and one equivalent of propionyl-CoA. The following two reactions convert propionyl-CoA into succinyl-CoA, a citric acidcycle intermediate, so it can be further metabolized. Each of the reactions requires a coenzyme. Identify the coenzyme for each step. From what vitaminsare the coenzymes derived? (Hint: see Chapter 23.) COO− COO−CH2CH2methylmalonyl-CoA succinyl-CoA CH3CH2 SCoAConsidering that triacylglycerols get hydrolyzed in the small intestine because of pancreatic lipases, write the reactions using structural formulas by which a 7-carbon fatty acid is activated and oxidized in the liver of this patient. Indicate cofactors and underscore the final CoA products.
- The mechanism for the conversion from alpha kytoglutarate into succinyl CoA by alpha-ketoglutare dehydrogenase is analogous to the pyruvate dehydrogenase mechanism. Draw and show the major intermediates and arrow pushing for the enzyme-catalyze process for the conversion of alpha-ketoglutarate to succinyl CoA. Note: the carbanion of thiamine pyrophosphate nucleophillically attacks C-2 of the alpha-ketoglutarate, i.e., the carbonyl carbon of that substrate.Five coenzymes are required by a-ketoglutarate dehydrogenase, the enzyme in the citric acid cycle that converts a-ketoglutarate to succinyl-CoA.a. Identify the coenzymes.b. Propose a mechanism for the reaction.Pyruvate dehydrogenase complex and α -ketoglutarate dehydrogenase complex are huge enzymes consisting of three discrete enzymatic activities. Which amino acids require a related enzyme complex, and what is the name of the enzyme?