Q.24 - Biology

Question

Explain the difference between an epitope and an antigen. 

Step-by-Step Solution

Answer

An epitope is the section of the antigen to which the antibodies bind. 

Introduction:

The antigen provokes the antibody response in the host, the antibody does not combine with the entire protein, however, only with the segment known as the epitope. 

Explanation:

An epitope is the component of an antigen, which is determined by the immune system, mainly the antibodies, T cells, or B cells. An epitope is also called an antigenic determinant. 

A structural molecule, which combines mainly with a lymphocyte or an antibody in the native form is known as an antigen. 

Thus, an epitope is the part of an antigen while the antigen combines with the receptor of a lymphocyte or antibody.