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.

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Answer 1

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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In 1956, E. P. Kennedy and S. B. Weiss published their study of membrane lipid phosphatidylcholine (lecithin) synthesis in rat liver. Their hypothesis was that phosphocholine joined with some cellular component to yield lecithin. In an earlier experiment, incubating 32 P-labeled phosphocholine at physiological temperature (37 °C) with broken cells from rat liver yielded labeled lecithin. This became their assay for the enzymes involved in lecithin synthesis. Determine the optimal pH for this enzyme and characterize the enzyme activity at different pH values. -O-P-O-CH2-CH₁₂-N(CH3)3 Phosphocholine H₂C-O-C-R HC-O-C-R2 + + + Cell fraction + ? HC-O-P-O-CH₁₂-CH₂-N(CH), O Phosphatidylcholine The researchers then centrifuged the broken cell preparation to separate the membranes from the soluble proteins. They tested three preparations: whole extract, membranes, and soluble proteins. Table 1 summarizes the results. Table 1: Cell fraction requirement for incorporation of 32p-phosphocholine into…

Researchers isolated an unknown substance, X, from rabbit muscle. They determined its structure from the following observations and experiments. (a) Qualitative analysis showed that X was composed entirely of C, H, and O. A weighed sample of X was completely oxidized and the H2O and CO2 produced were measured. This quantitative analysis revealed that X contained 40.00% C, 6.71% H, and 53.29% O by weight. (b) The molecular mass of X, as determined by mass spectrometry, was 90.00 atomic mass units (u). (c) Infrared spectroscopy showed that X contained one double bond. (d) X dissolved readily in water, and the solution demonstrated optical activity when tested in a polarimeter. (e) The aqueous solution of X is acidic. What is the empirical formula of X?

Answer 2

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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Answer 3

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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Answer 4

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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Answer 5

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.

Answer 6

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.

Answer 7

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.

Answer 8

Expert Solution & Answer

Answer to Problem 1P

Correct answer: The given structure of Citrulline is in L-conformation.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

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.

Answer 12

Ch. 3 - Prob. 1P Ch. 3 - Prob. 2P Ch. 3 - Prob. 3P Ch. 3 - Prob. 4P Ch. 3 - Prob. 5P Ch. 3 - Prob. 6P Ch. 3 - Prob. 7P Ch. 3 - Prob. 8P Ch. 3 - Prob. 9P Ch. 3 - Prob. 10P

Answer to Problem 1P

Explanation of Solution

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Chapter 3 Solutions