From Proteopedia
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Antibodies are also known as immunoglobulins (Igs). They are part of the Adaptive immune system. When a pathogen invades the body antibodies bind to the pathogen in order to neutralize it and mark it for destruction. The antibodies are grouped into five types IgA, IgD, IgM, IgG, and IgE. They each have specific functions for example IgE binds to allergens and triggers the release of histamine from mast cells and basophils. The basic stucture of an antibody is show in figure 1.
