Biochemistry
6th Edition
ISBN: 9781305577206
Author: Reginald H. Garrett, Charles M. Grisham
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 12P
How Do Vitamin-Derived Coenzymes Aid
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The following diagram shows the biosynthesis of B12 coenzymes, starting
with the vitamin. DMB is dimethylbenzimidazole.
CH,
OH
OH
- DMB
2e
(8
Coa+
он он
A
-DMB
DMB
CH,
Åderine
АТР
P + PP,
-DMB
(a) What one additional substrate or cofactor is required by enzyme B?
(b) Genetic deficiency in animals of enzyme Cwould result in excessive
urinary excretion of what compound?
(c) Some forms of the condition described in (b) can be successfully treated
by injection of rather massive doses of vitamin B12. What kind of genetic
alteration in the enzyme would be consistent with this result?
(d) Genetic deficiency in animals of ezyme B will result in excessive uri-
nary excretion ofwhat amino acid?
What is the first step in the catabolism of an amino acid to intermediates of cellular respiration?
Does PFK-2 (Phosphofructokinase-2) have coenzymes and Allosteric reguation?
Chapter 17 Solutions
Biochemistry
Ch. 17 - Global Carbon Dioxide Cycling Expressed as Human...Ch. 17 - Prob. 2PCh. 17 - Where Do the O Atoms in Organisms Come From? Name...Ch. 17 - How Do Catabolism and Anabolism Differ? What are...Ch. 17 - How Art the Enzymes of Metabolic Pathways...Ch. 17 - Why Do Anabolic and Catabolic Pathways Differ? Why...Ch. 17 - Prob. 7PCh. 17 - How Is Metabolism Regulated? (Integrates with...Ch. 17 - Prob. 9PCh. 17 - Prob. 10P
Ch. 17 - Which Is “Better: NMR or MS? Compare and...Ch. 17 - How Do Vitamin-Derived Coenzymes Aid Metabolism?...Ch. 17 - What Art the Features of the Series of -omes?...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Prob. 18PCh. 17 - Which of the following experimental approaches is...Ch. 17 - Prob. 20P
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