Chapter 18.7, Problem 18.5Q

Interpretation Introduction

Interpretation:

The four levels of the protein structure have to be described.

Concept Introduction:

Proteins are considered the most abundant macromolecules in the cell. The structure of protein is made up of 20 amino acids, they are known as $\text{α-aminoacids}$. The bond which joint all the amino acid is an amide bond also called peptide bond. The structure of protein is divided into four levels as follows:

(1) Primary structure

(2) Secondary structure

(3) Tertiary structure

(4) Quaternary structure