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Explore how neutrophils shape the immune response in health and disease. This poster highlights neutrophil pathogen defense mechanisms, including phagocytosis, degranulation, and NETosis, as well as neutrophil roles in inflammation and NET-associated pathologies.
DOWNLOAD NOWImmunoglobulin G (IgG) is a member of the immunoglobulin superfamily of glycoproteins that plays a central role in the adaptive immune response.1 It is produced by B cells and later secreted by plasma cells and is the most abundant circulating antibody in human and mouse serum.1,2,3 IgG consists of two heavy chains of approximately 50 kDa each and two light chains of approximately 25 kDa each.1 The heavy chains are linked together by disulfide bonds to form an Fc region and also combine with the light chains to form the Fab region, which mediate receptor and antigen binding, respectively.4 IgG exists as four isotypes in mice: IgG1, IgG2b, IgG3, and, in a strain-specific manner, IgG2a or IgG2c.5,6 IgG3 production is driven by bacterial- or viral-associated antigens, including HIV-1 and Staphylococcus antigens, and occurs early in the immune response following IgM class-switching.2,7 IgG3 binds to and neutralizes pathogens, as well as activates complement and opsonizes bacteria, leading to complement-dependent cytotoxicity (CDC) and antibody-dependent cell cytotoxicity (ADCC), respectively. Serum IgG3 levels are increased in patients with primary biliary cirrhosis, Sjögren's syndrome, systemic sclerosis, or systemic lupus erythematosus (SLE).8 Cayman's IgG3 (mouse) Rabbit Monoclonal Antibody - Biotinylated (RM218) can be used for ELISA. This antibody recognizes the Fab region of IgG3 from mouse samples.
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2. IgG subclasses and allotypes: From structure to effector functions. Front. Immunol. 5, 520 (2014).
3. IgG subclass expression by human B lymphocytes and plasma cells: B lymphocytes precommitted to IgG subclass can be preferentially induced by polyclonal mitogens with T cell help. J. Immunol. 130(2), 671-677 (1983).
4. Immunoglobulin. 2020, (2020).
5. IgG subclass co-
6. The need for IgG2c specific antiserum when isotyping antibodies from C57BL/6 and NOD mice. J. Immunol. Methods 212(2), 187-192 (1998).
7. Role of IgG3 in infectious diseases. Trends Immunol. 40(3), 197-211 (2019).
8. Serum IgG subclasses in autoimmune diseases. Medicine (Baltimore) 94(2), e387 (2015).