Description_x000D_ General description_x000D_ Human IgGs consist of four subclasses (1-4) that can be recognized by antigenic 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.Monoclonal Anti-Human IgG1 specifically recognizes Human IgG1. The antibody shows no cross-reactivity with human IgG2, IgG3, or IgG4. This clone has been established as a useful human IgG1 specificity standard by the WHO/IUIS._x000D_ Monoclonal Anti-Human IgG1 (mouse IgG2a isotype) is derived from the 8c/6-39 hybridoma (also known as HP6019), produced by the fusion of mouse myeloma cells and splenocytes from a mouse immunized with the Fc fragment of a human IgG1 myeloma protein._x000D_ Immunogen_x000D_ The Fc fragment of a human IgG1 myeloma protein_x000D_ Application_x000D_ The antibody is recommended to use in various immunological techniques, including ELISA._x000D_ Biochem/physiol Actions_x000D_ The immunoglobin G (IgG) subclass may be preferentially produced in response to different antigens and pathological conditions. For instance, anti-polysaccharide responses are mainly of the IgG2 subclass while protein antigens give rise to IgG1 and IgG3 antibodies. Human IgG1 is the main antibody produced against tetanus toxoid antibodies. Elevation of IgG1 levels has been found in the cerebral spinal fluid of patients with multiple sclerosis._x000D_ Physical form_x000D_ Supplied as lyophilized powder. After reconstitution with 0.1 mL of distilled water to a final antibody concentration of ∼ 2 mg/mL, the solution contains 1% BSA, 2.5% trehalose, 0.05% MIT in 0.01 M sodium phosphate buffered saline_x000D_ Other Notes_x000D_ This product is for R&D use only, not for drug, household, or other uses.