The antibody is specific for the Fc portion of human IgG1 and is non-reactive with other IgG subclasses. This clone, also described as HP-6091, was found to exhibit a valuable profile of reactivity and specificity for human IgG1 by the IUIS/WHO study.
Human IgG consists of four subclasses (1-4) that can be recognized by antigen differences in their heavy chains. They constitute approximately 65, 30, 5 and 4% of the total IgG respectively. Each subclass has different biological and physiochemical properties. The IgG subclass may be preferentially produced in response to different antigens. For instance, antipolysaccharide responses are mainly of the IgG2 subclass, while protein antigens give rise to IgG1 and IgG3 antibodies. Lipopolysaccahrides stimulate an IgG2 response in PBL′s and an IgG1 response in the spleen. Human IgG1 is the predominant subclass of in vivo and in vitro produced anti-tetanus toxoid antibodies.
Monoclonal Anti-Human IgG1 (mouse IgG2a isotype) is derived from the hybridoma produced by the fusion of mouse myeloma cells and splenocytes from an immunized mouse.
Monoclonal Anti-Human IgG1−FITC antibody produced in mouse has been used in flow cytometry. It has also been used in direct hemagglutination (HA) and hemagglutination inhibition
IgG1 and IgG3 have an ability to adhere to the mononuclear phagocytes. A disproportionate elevation of IgG1 has also been found in the cerebral spinal fluid of patients with multiple sclerosis. Examination of the distribution pattern of IgG subclasses in different types of diseases may provide insight into the immunological processes involved and may assist in the diagnosis of various disorders.
Solution in 0.01 M sodium phosphate buffer, pH 8.0, containing 1% inactivated bovine serum albumin and 15 mM sodium azide.
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