The reason why cysteine has R configuration while all the others have S configuration. Concept introduction: Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO 2 - group at the top and pointing the side chain downwards and the NH 3 group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration. To determine: Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Question

Want to see the full answer?

Answer 1

Question

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Explain why, when the guanidino group of arginine is protonated, the double-bonded nitrogen is the nitrogen that accepts the proton.

Which L-amino acid has "R" configuration?

What type of interaction (IMF) would be present between side chains of the following amino acid residues? Explain your answers. a) 2 phenylalanine residues b) Methionine and valine residues c) Glutamate and arginine residues

Answer 2

Question

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Answer 6

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Answer 7

Chapter 26.1, Problem 2P

Interpretation Introduction

Interpretation:

The reason why cysteine has R configuration while all the others have S configuration.

Concept introduction:

Except glycine, all the other 19 amino acids have chiral centers and hence can occur as two enantiomers. But the naturally occurring enantiomers resemble the L sugars, i.e. placing the CO₂- group at the top and pointing the side chain downwards and the NH₃ group on the left. These usually have S configuration, which is dependent on the priority of the attached molecules. But this is not the case for cysteine as it has R configuration.

To determine:

Why cysteine is the L amino amino acid that occurs in R configuration naturally?

Answer 8

Expert Solution & Answer

Answer 9

Expert Solution & Answer

Answer 10

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 11

Ch. 26.1 - How many of the -amino acids shown in Table 26-1...Ch. 26.1 - Prob. 2P Ch. 26.1 - Prob. 3P Ch. 26.2 - Hemoglobin has pI=6.8. Does hemoglobin have a net...Ch. 26.3 - Show how you could prepare the following -amino...Ch. 26.3 - What alkyl halides would you use to prepare the...Ch. 26.3 - Prob. 7P Ch. 26.4 - There are six isomeric tripeptides that contain...Ch. 26.4 - Draw the structure of M-P-V-G, and indicate its...Ch. 26.5 - Prob. 10P

Solution Summary: The author explains that cysteine has R configuration, while all the other 18 L amino acids have S configuration.

Concept explainers

Videos

Want to see the full answer?

Chapter 26 Solutions