The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given. Concept Introduction: The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

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Answer 1

Question

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

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In relation to the spatial structure of the proteins select the INCORRECT alternative: (a) The quaternary structure of proteins consists of the association of two or more protein chains to form the complete protein. (b) The tertiary structure of proteins is mainly due to long-range interactions between amino acids that are far apart in the protein sequence but spatially close due to protein coiling. (c) Disulfide bridges are produced or broken as a result of oxidation-reduction processes. (d) The interactions between peptide chains in the secondary structure of proteins are basically due to Van der Waals forces. (e) The primary structure of proteins is basically due to the existence of covalent bonds between the different amino acids that constitute them.

Consider the following peptide : Phe – Glu – Ser – Met and Val – Trp – Cys – Leu. Do these peptides have different net charges at (a) pH 1? (b) pH 7? Indicate the charges at both pH values

Answer the (b) part of the question 6 (a) A decapeptide has the following amino acid composition: Ala2 , Arg, Cys, Glu, Gly, Leu, Lys, Phe, Val Partial hydrolysis yields the following tripeptides: Cys-Glu-Leu + Gly-Arg-Cys + Leu-Ala-Ala+ Lys-Val-Phe + Val-Phe-Gly. Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. (b) Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly

Answer 2

Question

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Expert Solution & Answer

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Answer 3

Question

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Expert Solution & Answer

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Answer 4

Question

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Expert Solution & Answer

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Answer 5

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Answer 6

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

Answer 7

Chapter 27, Problem 27.42P

(a)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.

Concept Introduction:

The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 27.1 - Of the 20 protein-derived amino acids shown in...Ch. 27.2 - Prob. 27.2P Ch. 27.2 - Prob. 27.3P Ch. 27.3 - Draw a structural formula for Lys-Phe-Ala. Label...Ch. 27.4 - Which of these tripeptides are hydrolyzed by...Ch. 27.4 - Deduce the amino acid sequence of an undecapeptide...Ch. 27.6 - Prob. 27.7P Ch. 27 - What amino acid does each abbreviation stand for?...Ch. 27 - The configuration of the chiral center in -amino...Ch. 27 - Assign an R or S configuration to the chiral...

Solution Summary: The author explains how the number of different tetra peptides can be calculated by using the factorial combination process.

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Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

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Chapter 27 Solutions

Solution Summary: The author explains how the number of different tetra peptides can be calculated by using the factorial combination process.

Concept explainers

Videos

Interpretation: The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.

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Chapter 27 Solutions

Interpretation:

The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.