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medical dictionary

<immunology> A specific protein substance that is produced by plasma cells to aid in fighting infection.

Some immunoglobulins (gamma globulin) take part in various immune responses of the body to bacteria or foreign substances (allergens, tumour or transplanted tissue).

Examples include IgG, IgM, IgA, IgD and IgE.

Abbreviation: Ig

(30 Mar 1998)