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Question

In the figure, structure of an antibody molecule is shown. Name the parts A, B and C.
Show A, B and C in the diagram.

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Solution

Structure of antibody:

An antibody molecule is made up of four peptide chains, two small called light chains and two longer called heavy chains. Hence, it is represented as H2L2.


Labels:

A is the antigen binding site: It is the antigen-binding cleft of the antibody.

B is the light peptide chain: Denoted by L, it is linked to the heavy peptide chain through a single disulphide bond.

C is the heavy peptide chain: Denoted by H, it is connected to the other heavy peptide chain via two disulphide bonds.

Final answer

A: Antigen binding site
B: Light chain
C: Heavy chain



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