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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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Consider the 20 most common amino acids shown in Fig. 21.2.

Although you may not be asked to memorize all these structures, it will help your study if you are familiar with them. Choose any five of the amino acids and sketch their structures. Also sketch the formula for a general amino acid. Circle the R group in each of your drawings.

Interpretation Introduction

Interpretation:

Interpret and draw the structure of 5 amino acids, general amino acid and R group in each structure of amino acid should be circled.

Concept Introduction:

Amino acids are the structural unit of polypeptide molecule which consists of a carboxyl group at one end and amino group on other end. Alkyl group is also present in most of the amino acid to create chirality in the molecule while amino acids with no alkyl group known as achiral.

Glycine and alanine are example of amino acid which consist of amino and carboxyl group. Amino group of one amino acid linked to carboxyl group of 2nd amino acid and linear chain is created to produce a polypeptide structure.

Explanation

Sketch of general amino acid:

R group indicates the alkyl group.

COOH indicates the carboxyl group.

NH2 indicates the amino group.

Primary structure of protein consists of long chain of amino acid linked to each other through peptide bond. Amino group of one amino acid linked to carboxyl group of 2nd amino acid and linear chain is created to produce 10 structure of protein.

Sketch of five amino acids (the R groups are encircled) are:

Glycine

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