For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified. Concept introduction: The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis. Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions. To draw and identify : the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

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Answer 1

Question

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

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Answer 2

Question

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

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Answer 3

Question

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

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Answer 4

Question

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

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Answer 5

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

Answer 6

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

Answer 7

Chapter 25.4, Problem 25CC

Interpretation Introduction

Interpretation:

For the dipeptide Phe-Leu, s-trans conformation needs to be drawn and both N-terminus and C-terminus need to be identified.

Concept introduction:

The peptide bonds are simply amide linkages. These amide linkages have a resonance structure where the C-N bond has got some double-bond character. Due to this there is a restricted rotation in the amide bond as we see in normal amides. This restricted rotation gives rise to two possible conformations known as s-trans and s-cis.

Please remember that s-trans conformation is more stable than s-cis conformation due to less steric interactions.

To draw and identify: the s-trans conformation for Phe-Leu and identify the N-terminus and C-terminus.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 25.2 - Prob. 1CC Ch. 25.2 - Prob. 2CC Ch. 25.2 - Prob. 3CC Ch. 25.2 - Prob. 1LTS Ch. 25.2 - Prob. 4PTS Ch. 25.2 - Prob. 7CC Ch. 25.2 - Prob. 8CC Ch. 25.2 - Prob. 9CC Ch. 25.2 - Prob. 10CC Ch. 25.2 - Prob. 11CC

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Chapter 25 Solutions