ANATOMY

Detailed explanation-1: -The IgG antibody molecule is made up of four polypeptide chains, comprising two identical light chains and two identical heavy chains, and can be thought of as forming a flexible Y-shaped structure.

Detailed explanation-2: -What are antibodies? Antibodies are proteins that protect you when an unwanted substance enters your body. Produced by your immune system, antibodies bind to these unwanted substances in order to eliminate them from your system. Another word for antibody is immunoglobulin.

Detailed explanation-3: -1. Antibodies are Y-shaped proteins made in great abundance by our immune system. While antibodies come in a few shapes and sizes, the most familiar of these are the Y-shaped proteins known as IgG antibodies (immunoglobulin G).

Detailed explanation-4: -The basic structural unit of an antibody molecule consists of four polypeptide chains, two identical light (L) chains (each containing about 220 amino acids) and two identical heavy (H) chains (each usually containing about 440 amino acids).