What are the differences between antigen and antibody?

Question

Accepted Answer

Basis of differentiation

Antigen

Antibody

Definition

An antigen is any substance that triggers an immune response in the body

An antibody is a blood protein that is generated against a specific antigen

Classification

Can either be proteins, carbohydrates, nucleic acids, or lipids

Are glycoproteins

Effect in body

Can cause either diseases or allergic reactions

Protects the body from antigens by lysing the pathogen or immobilizing the antigen

Types

The four types are exogenous antigens, autoantigens, neoantigens, and endogenous antigens

The five types include: IgM, IgG, IgE, IgA, and IgD

Antigen-antibody interaction

Acts as the key

Acts as the lock

Domain interactions

Interacting domain with the body is known as the epitope

The variable region of the antibody which specifically binds to the epitope is called the paratrope

Basis of differentiation	Antigen	Antibody
Definition	An antigen is any substance that triggers an immune response in the body	An antibody is a blood protein that is generated against a specific antigen
Classification	Can either be proteins, carbohydrates, nucleic acids, or lipids	Are glycoproteins
Effect in body	Can cause either diseases or allergic reactions	Protects the body from antigens by lysing the pathogen or immobilizing the antigen
Types	The four types are exogenous antigens, autoantigens, neoantigens, and endogenous antigens	The five types include: IgM, IgG, IgE, IgA, and IgD
Antigen-antibody interaction	Acts as the key	Acts as the lock
Domain interactions	Interacting domain with the body is known as the epitope	The variable region of the antibody which specifically binds to the epitope is called the paratrope