The property of peptides and proteins in the absence of sulfur-containing amino acid is to be interpreted. Concept introduction: Peptides are the polymers of amino acid residues. A peptide bond is formed between the amino group ( − NH 2 ) of one amino acid and the carboxylic group ( − COOH ) of the other amino acid, associated with the loss of a water molecule. A simple amino acid contains a carboxylic group, a hydrogen atom, a side chain (R group), and an amino group. Cysteine is the amino acid that contains sulfur in its side chain.

Question

carbons in each of the structures below. For instance, the central carbon of chloromethylbutane (pictured 3. A chiral carbon is a carbon that is single-bonded to four different types of groups. Identify the chiral above) is a chiral carbon. (Can you see how the groups attached to it are all chemically different?) In each of the chiral molecules below, identify all the carbons that are chiral carbons by drawing a circle around each one of them. (a) the carbohydrate glucose H O (b) the carbohydrate fructose CH₂OH 1C H-C-OH 3 HO-C-H 4 H-C-OH 5 H-C-OH 6CH₂OH D-Glucose (linear form) (c) the amino acid leucine O O H3C. HO H H- -OH CH 3 NH2 H- -OH CH₂OH OH

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Question

Chapter 3, Problem 45RE

Interpretation Introduction

Interpretation:

The property of peptides and proteins in the absence of sulfur-containing amino acid is to be interpreted.

Concept introduction:

Peptides are the polymers of amino acid residues. A peptide bond is formed between the amino group (−NH2) of one amino acid and the carboxylic group (−COOH) of the other amino acid, associated with the loss of a water molecule.

A simple amino acid contains a carboxylic group, a hydrogen atom, a side chain (R group), and an amino group. Cysteine is the amino acid that contains sulfur in its side chain.

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