Antibody May 2026

: Forms the base and lower parts of the arms. It determines the antibody's class and how it interacts with other parts of the immune system. Fab and Fc Fragments :

The canonical antibody structure (typically IgG) is composed of four polypeptide chains: antibody

An , also known as an immunoglobulin (Ig) , is a specialized Y-shaped protein produced by the immune system to identify and neutralize foreign substances like bacteria, viruses, and toxins. These invaders are known as antigens . 1. Structure of an Antibody : Forms the base and lower parts of the arms

: The two arms that bind to antigens.

: It consists of two identical heavy chains (~50 kDa each) and two identical light chains (~25 kDa each), held together by disulfide bonds. also known as an immunoglobulin (Ig)