Lehninger Principles of Biochemistry
7th Edition
ISBN: 9781464126116
Author: David L. Nelson, Michael M. Cox
Publisher: W. H. Freeman
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Question
Chapter 3, Problem 1P
Summary Introduction
To determine: Whether the given Citrulline structure is L-amino acid or D-amino acid.
Introduction: Isomers are the compounds that have similar molecular formula, but different structural formula. L-form (levorotatory) and D-form (dextrorotatory) are optical isomers or stereoisomers. They have the same chemical structure, but their spatial arrangement is different.
Expert Solution & Answer
Answer to Problem 1P
Correct answer: The given structure of Citrulline is in L-conformation.
Explanation of Solution
Explanation:
In D-Citrulline, the amino group (-NH2) present on the penultimate carbon is on the right side. In L-Citrulline, the amino group (-NH2) present on the penultimate carbon is on the left side. In the given case, the amino group is present on the left side and thus, the given structure is L-conformation of Citrulline.
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9. Which one of the compounds below is the major organic product obtained from
the following reaction sequence, starting with ethyl acetoacetate?
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7. Only one of the following ketones cannot be made via an acetoacetic ester
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Chapter 3 Solutions
Lehninger Principles of Biochemistry
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