Antibody -

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

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 antibody

: The two arms that bind to antigens.

The canonical antibody structure (typically IgG) is composed of four polypeptide chains: : It consists of two identical heavy chains

: The tail of the "Y" that communicates with immune cells to trigger a response. 2. The Five Classes of Antibodies Antibody Structure | Request PDF - ResearchGate held together by disulfide bonds. An