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BASIC IMMUNOGLOBULIN FUNCTION - prevent that virus from...

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BASIC IMMUNOGLOBULIN FUNCTION Antibodies function in a variety of ways designed to eliminate the antigen that elicited their production. Some of these functions are independent of the particular class (isotype) of immunoglobulin. These functions reflect the antigen binding capacity of the molecule as defined by the variable and hypervariable (idiotypic) regions. For example, an antibody might bind to a toxin and prevent that toxin from entering host cells where its biological effects would be activated. Similarly, a different antibody might bind to the surface of a virus and
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Unformatted text preview: prevent that virus from entering its host cell. In contrast, other antibody functions are dependent upon the immunoglobulin class (isotype). These functions are contained within the constant regions of the molecule. For example, only IgG and IgM antibodies have the ability to interact with and initiate the complement cascade. Likewise, only IgG molecules can bind to the surface of macrophages via Fc receptors to promote and enhance phagocytosis. The following table summarizes some immunoglobulin properties....
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