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Invitrogen
Description: Interleukin-12 (IL-12) is a heterodimeric 70 kD (p70) cytokine composed of two covalently linked, glycosylated chains, 40kD (p40) and 35-kD (p35). IL-12 is mainly produced by monocytes, macrophages, and dendritic cells in response to bacterial products such as lipopolysaccharides (LPS), to intracellular pathogens or upon interaction with activated T cells. IL-12 was originally discovered because of its ability to induce interferon-gamma production, cell proliferation, and cytotoxicity mediated by natural killer cells and T cells. It is now established that IL-12 also plays a key role in the development of Th1 responses, leading to IFN-gamma and IL-2 production. These cytokines can in turn promote T-cell responses and macrophage activation. The p40 and p35 subunits by themselves have no IL-12 bioactivity, though the p40 homodimer has been shown to bind the IL-12 receptor and to be an antagonist of IL-12 p70. Free p40 is typically secreted in vast excess of IL-12 p70 by cells co-expressing both the p35 and p40 subunits. The p40 subunit of IL-12 has been shown to have extensive amino acid sequence homology to the extracellular domain of the IL-6 receptor, while the p35 subunit shows some homology to IL-6 and G-CSF.
Applications Reported: The intended use of the Recombinant Mouse IL-12 p40 Monomer Single-Use ELISA RSG Standard is as a standard for mouse IL-12 p40 Monomer Ready-SET-Go! ELISA and mouse IL-12 p40 Monomer matched antibody pair ELISA. Please refer to the Certificate of Analysis included with each ELISA set for instructions on the proper dilution of the recombinant standard.
Applications Tested: This cytokine standard has been calibrated, and subsequently tested by sandwich ELISA using the mouse IL-12 p40 ELISA pair (C15.6/C17.8).
Source: Insect cells infected with baculovirus: mouse p40, amino acids met 1-Ser 335, accession # NM_008352.
Purity: >98% as determined by SDS-PAGE.
Storage and handling: For best recovery, quick-spin vial prior to opening. For dilution of current stock, use ELISA Assay Diluent.
IL12B (IL-12 p40) encodes a subunit of interleukin 12, a cytokine that acts on T and natural killer cells, and has a broad array of biological activities. Interleukin 12 is a disulfide-linked heterodimer composed of the 40 kDa cytokine receptor like subunit encoded by this gene, and a 35 kDa subunit encoded by IL12A. This cytokine is expressed by activated macrophages that serve as an essential inducer of Th1 cells development. This cytokine has been found to be important for sustaining a sufficient number of memory/effector Th1 cells to mediate long-term protection to an intracellular pathogen. Overexpression of this gene was observed in the central nervous system of patients with multiple sclerosis (MS), suggesting a role of this cytokine in the pathogenesis of the disease. The promoter polymorphism of this gene has been reported to be associated with the severity of atopic and non-atopic asthma in children.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: CLMF p40; Cytotoxic lymphocyte maturation factor 40 kDa subunit; il 12; IL-12 subunit p40; IL-12B; IL12A; ILN; Interleukin; Interleukin 12; Interleukin-12 subunit beta; Interleukin12; RP23-388G23.1
Gene Aliases: Il12b
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