Illustrate the biochemical pathways for one complete cycle of b-oxidation of fatty acyl CoA (giving names and structures of intermediates, substrates and products of each
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Illustrate the biochemical pathways for one complete cycle of b-oxidation of fatty acyl CoA (giving names and structures of intermediates, substrates and products of each reaction, and names of enzymes).
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- Understanding the Mechanism of the HMC-CoA Synthase Reaction Write a suitable mechanism for the HMG-CoA synthase reaction. What is the chemistry that drives this condensation reaction?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.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.
- Glucagon secretion causes inhibition of intracellular acetyl-CoA carboxylase activity by several mechanisms. Name all you can think of.Before b-oxidation, fatty acids are converted to theirCoASH derivatives. Explain why this reaction isnecessary.Sheryl had an elevated level of the CK-MB isoenzyme of creatine phosphokinase.What are the different isoenzymes of CK, and what is their medical significance?Explain how enzymes are named, and how isoenzymatic forms of a particular enzyme are the same, yet differ from each other.
- what is the correct sequence of reactions on the given choices with regard to beta oxidation of fatty acyl-CoA. Describe the β-oxidation of the fatty acid palmitatePredict which one of the five steps of the a-ketoglutarate dehydrogenase complex reaction is metabolically irreversible under physiological conditions and explain why.
- The acyl-CoA dehydrogenase deficiency diseases are a groupof inherited defects that impair the b-oxidation of fatty acids.Symptoms of the disease range from nausea and vomiting tofrequent comas. Symptoms may be alleviated by eating regularly and avoiding periods of starvation (12 hours or more).Why does this simple procedure alleviate the symptoms?Acetyl-CoA and succinyl-CoA are both highenergy thioesters, but their chemical energy is put to differentuses. Elaborate.When the identical subunits of chicken liver fatty acid synthase are dissociated in vitro, all of the activities can be detected in the separated subunits except for the β-ketoacyl synthase reaction and the overall synthesis of palmitate. Explain these observations.