Ia
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  Ia



Ia

    "Immune response-associated" proteins, found on B cells and antigen-presenting cells of mice; an old term now replaced with MHC (major histocompatibility complex) class II molecules.

RELATED TERMS
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Histocompatibility
Literally, the ability of tissues to get along; in immunology, it means identity in all transplantation antigens. These antigens, in turn, are collectively referred to as histocompatibility antigens.



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Ia

Idiotype
The combined antigenic determinants (idiotopes) found on antibodies of an individual that are directed at a particular antigen; such antigenic determinants are found only in the variable region.

Immediate-type hypersensitivity
Hypersensitivity tissue reaction occurring within minutes after the interaction of antigen and antibody.

Immune adherence
The adherence of particulate antigen coated with C3b to tissue having cells with C3b receptors.

Immune complex
Antigen bound to antibody.

Immune modulators
Substances that control the expression of the immune response.

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