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The water-accessible surface area of an IgG antibody. Immunoglobulin G (IgG) is a type of antibody. Representing approximately 75% of serum antibodies in humans, IgG is the most common type of antibody found in blood circulation. [1] IgG molecules are created and released by plasma B cells. Each IgG antibody has two paratopes.
The IgG, IgE and IgA antibody isotypes are generated following class-switching during germinal centre reaction and provide different effector functions in response to specific antigens. IgG is the most abundant antibody class in the serum and it is divided into 4 subclasses based on differences in the structure of the constant region genes and ...
This region allows antibodies to activate the immune system, for example, through binding to Fc receptors. In IgG , IgA and IgD antibody isotypes , the Fc region is composed of two identical protein fragments, derived from the second and third constant domains of the antibody's two heavy chains ; IgM and IgE Fc regions contain three heavy chain ...
Molecule function/category Examples Description Antigen receptors: Antibodies or immunoglobulins: IgA IgD IgE IgG IgM; T-cell receptor chains; Antigen receptors found on the surface of T and B lymphocytes in all jawed vertebrates belong to the IgSF. Immunoglobulin molecules (the antigen receptors of B cells) are the founding members of the IgSF.
Since these antibodies sometimes destroy red blood cells they can cause anemia; this test can help clarify the condition. The indirect Coombs test detects antibodies that are floating freely in the blood. [1] These antibodies could act against certain red blood cells; the test can be carried out to diagnose reactions to a blood transfusion. [1]
Members of the immunoglobulin superfamily are found in hundreds of proteins of different functions. Examples include antibodies, the giant muscle kinase titin, and receptor tyrosine kinases. Immunoglobulin-like domains may be involved in protein–protein and protein–ligand interactions. [3]
Anti-Pan-Primate Antibody Type Description; Anti-Pan-Primate IgG [8F1] This is a recombinant monoclonal antibody to pan-primate IgG. This antibody reacts with most primate IgG antibodies, including human IgG. In a research setting the antibody has been used via ELISA to count IgG in supernatants from lung and lymph node tissues from cynomolgus ...
The classical complement pathway can be initiated by the binding of antigen-antibody complexes to the C1q protein. The globular regions of C1q recognize and bind to the Fc region of antibody isotypes IgG or IgM. [2] These globular regions of C1q can also bind to bacterial and viral surface proteins, apoptotic cells, and acute phase proteins. [5]
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