The described structure must be determined for a type of protein folding (primary, secondary, tertiary or quaternary). Concept introduction: A cysteine is one of the common amino acids. The structure of cysteine includes a carboxyl group, an NH 2 ( amine ) group, and an SH (thiol group). The structure of cysteine is as follows:

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Chapter 19, Problem 65E

Interpretation Introduction

Interpretation:

The described structure must be determined for a type of protein folding (primary, secondary, tertiary or quaternary).

Concept introduction:

A cysteine is one of the common amino acids. The structure of cysteine includes a carboxyl group, an NH₂ (amine) group, and an SH (thiol group). The structure of cysteine is as follows:

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