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Antigen and Antibody a comparison

Antigen is any foreign particle that elicits an immune response or that specifically binds to an antibody or a T-cell receptor (often used as a synonym for immunogen).
Antibodies or immunoglobulins are glycoproteins consisting of identical heavy chains and 2 identical light chains that recognizes a specific epitope on an antigen and facilitates elimination of that antigen. 
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Difference Between: Antigen & Antibody

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Antigens (immunogens)

Antibodies (immunoglobulins)
1
Any foreign substance that induce an immune response
Are glycoproteins formed in the body for combating antigens
2
Antigens are generally proteins but can be carbohydrates, lipids or nucleic acids
Antibodies are proteins
3
Triggers the formation of antibodies
Variable site has the antigen binding domain
4
The region of the antigen that interacts with the antibodies is called epitopes.
The variable region of the antibody that specifically binds to an epitope is called paratope
5
Antigens cause disease or allergic reaction
Protects the system by immobilisation or lysis of antigenic material
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