Light chain

Definition

Light chains are one of the two types of polypeptide chains that compose an antibody molecule, smaller than the heavy chain and found in pairs. Each antibody contains two light chains that contribute to its antigen-binding specificity and function.

Related terms

Antibody: A protein produced by B-cells in response to an antigen, used by the immune system to identify and neutralize foreign objects.

Antigen: Any substance that induces an immune response in the body, especially the production of antibodies.

Heavy Chain: The larger polypeptide component of an antibody that contributes to its overall structure and antigen-binding sites