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Correctly label parts of an IgG antibody: a. Heavy chains, b. Light Chains, c. Variable regions,...

Correctly label parts of an IgG antibody: a. Heavy chains, b. Light Chains, c. Variable regions, d. Antigen binding sites, e. Constant regions or “Fc Crystallizable fragment regions”, f. Antigen-binding (Fab) fragment, g. Hinge, h. Disulfide bonds.

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Expert Solution

Structure of IgG antibody

The IgG molecule consists of four polypeptide chains - two heavy chains and two light chains.

The polypeptide chains are joined together by disulfide bridges.

Each heavy chain and light chain has constant regions (C) and variable regions (V). The light chain consists of 1 variable (v L ) and 1 constant region (C L ). And the heavy chain consists of 1 variable (v H) chain linked to 3 constant regions (C H1 , C H2 , and C H3 ).

The Fab domain consists of 2 variable and 2 constant domains which determines the antigen specificity of the antibody. It consists of the antigen binding site.

The Fc domain is important for mediating immune system effector functions

The hinge region forms a link between the Fab and the Fc regions.

gladiator answered 1 year ago
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