Which of the following Immunoglobulin acts as a receptor for antigens
Major Functions of ImmunoglobulinsImmunoglobulinMajor FunctionsIgGMain antibody in the secondary response. Opsonizes bacteria, making them easier to phagocytose. Fixes complement, whichenhances bacterial killing. Neutralizes bacterial toxins and viruses. Crosses the placenta.IgASecretory IgA prevents attachment of bacteria and viruses to mucous membranes. Does not fix complement.IgMProduced in the primary response to an antigen. Fixes complement. Does not cross the placenta. Antigen receptor on the surfaceof B cells.IgDFound on the surfaces of B cells where it acts as a receptor for antigenIgEMediates immediate hypersensitivity by causing the release of mediators from mast cells and basophils upon exposure to antigen(allergen). Defends against worm infections by causing the release of enzymes from eosinophils. Does not fix complement. Mainhost defense against helminthic infections.Ref: Harper&;s Biochemistry; Chapter 52; Plasma Proteins & Immunoglobulins; Table: 52-9
IgG
IgM
IgD
IgE
miscellaneous