describe structure of antibody
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Antibodies are immune system-related proteins called immunoglobulins. Each antibody consists of four polypeptides– two heavy chains and two light chains joined to form a "Y" shaped molecule. The amino acid sequence in the tips of the "Y" varies greatly among different antibodies.
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- (1) There are four (4) polypeptide chains which make the antibody.
- (2) There are two heavy or H-chains and two light or L- chains
- (3) Each chain has two distinct regions, the variable region and the constant region.
- (4) Variable regions carry the antigen binding site or paratope.
- (5) This part of antibody recognizes and binds to the specific antigen to fornm an antigen antibody complex.
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