Human interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocyte maturation factor 2, p40) ELISA Kit | IL12B elisa kit

Human Interleukin 12, IL-12/P40 ELISA Kit

Cat. Num. AAA703921

• Gene Names: IL12B; CLMF; NKSF; CLMF2; NKSF2; IL-12B
• Reactivity: Human
• Synonyms: interleukin 12B (natural killer cell stimulatory factor 2; cytotoxic lymphocyte maturation factor 2; p40); Human Interleukin 12; IL-12/P40 ELISA Kit; IL-12/P40 ELISA KIT; CLMF; CLMF2; IL-12B; NKSF; NKSF2; IL12; subunit p40; interleukin 12; p40; interleukin 12B; interleukin-12 beta chain; natural killer cell stimulatory factor; 40 kD subunit; IL12B elisa kit

• Reactivity: Human
• Specificity: This assay has high sensitivity and excellent specificity for detection of Human IL12B. No significant cross-reactivity or interference between Human IL12B and analogues was observed.
• Sequence Length: 328

• Samples: Serum, plasma, cell culture supernates, urine and tissue homogenates
• Detection Range: 7.8pg/ml-500 pg/ml
• Sensitivity: 1.95 pg/ml
• Intra-assay Precision: Intra-assay Precision (Precision within an assay): CV% is less than 8%; Three samples of known concentration were tested twenty times on one plate to assess.; Inter-assay Precision (Precision between assays): CV% is less than 10%; Three samples of known concentration were tested in twenty assays to assess.
• Detection Wavelength: 450 nm
• Sample Volume: 50-100ul
• Preparation and Storage: Unopened test kits should be stored at 2 to 8 degree C upon receipt. Please refer to pdf manual for further storage instructions.

Typical Testing Data/Standard Curve (for reference only)

Related Product Information for IL12B elisa kit

Introduction: Interleukin 12 (IL-12) is an interleukin that is naturally produced by macrophages and human B-lymphoblastoid cells (NC-37) in response to antigenic stimulation. IL-12 is composed of a bundle of four alpha helices. It is a heterodimeric cytokine encoded by two separate genes, IL-12A (p35) and IL-12B (p40). The active heterodimer, and a homodimer of p40 are formed following protein synthesis. IL-12 is involved in the differentiation of naive T cells into Th1 cells, which is important in resistance against pathogens. It is known as a T cell stimulating factor, which can stimulate the growth and function of T cells. It stimulates the production of interferon-gamma (IFN-gamma) and tumor necrosis factor-alpha (TNF-alpha) from T and natural killer (NK) cells, and reduces IL-4 mediated suppression of IFN-gamma. T cells which produce IL-12 have a coreceptor, CD30, which is associated with IL-12 activity. IL-12 plays an important role in the activities of natural killer cells and T lymphocytes. IL-12 mediates enhancement of the cytotoxic activity of NK cells and CD8+ cytotoxic T lymphocytes. There also seems to be a link between IL-2 and the signal transduction of IL-12 in NK cells. IL-2 stimulates the expression of two IL-12 receptors, IL-12R-beta1 and IL-12R-beta2, maintaining the expression of a critical protein involved in IL-12 signaling in NK cells. Enhanced functional response is demonstrated by IFN-gamma production and killing of target cells. IL-12 also has anti-angiogenic activity, which means it can block the formation of new blood vessels. It does this by increasing production of interferon gamma, which in turn increases the production of a chemokine called inducible protein-10 (IP-10 or CXCL10). IP-10 then mediates this anti-angiogenic effect. Because of its ability to induce immune responses and its anti-angiogenic activity, there has been an interest in testing IL-12 as a possible anti-cancer drug. There is a link that may be useful in treatment between IL-12 and the diseases psoriasis and inflammatory bowel disease.

Principle of the Assay: The microtiter plate provided in this kit has been pre-coated with an antibody specific to IL-12. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody preparation specific for IL-12 and Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. Then a TMB (3,3',5,5' tetramethyl-benzidine) substrate solution is added to each well. Only those wells that contain IL-12, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm +/- 2 nm. The concentration of IL-12 in the samples is then determined by comparing the O.D. of the samples to the standard curve.

NCBI and Uniprot Product Information

• NCBI GI #: 24497438
• NCBI GeneID: 3593
• NCBI Accession #: NP_002178.2
• NCBI GenBank Nucleotide #: NM_002187.2
• UniProt Accession #: P29460
• Molecular Weight: 37,169 Da
• NCBI Official Full Name: interleukin-12 subunit beta
• NCBI Official Synonym Full Names: interleukin 12B
• NCBI Official Symbol: IL12B
• NCBI Official Synonym Symbols: CLMF; NKSF; CLMF2; NKSF2; IL-12B
• NCBI Protein Information: interleukin-12 subunit beta; CLMF p40; IL-12 subunit p40; IL12, subunit p40; interleukin 12, p40; interleukin-12 beta chain; NK cell stimulatory factor chain 2; cytotoxic lymphocyte maturation factor 40 kDa subunit; natural killer cell stimulatory factor, 40 kD subunit; interleukin 12B (natural killer cell stimulatory factor 2, cytotoxic lymphocyte maturation factor 2, p40)
• UniProt Protein Name: Interleukin-12 subunit beta
• Protein Family: Interleukin
• UniProt Gene Name: IL12B
• UniProt Synonym Gene Names: NKSF2; IL-12B; CLMF p40; NKSF2
• UniProt Entry Name: IL12B_HUMAN

NCBI Description

This gene 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 kD cytokine receptor like subunit encoded by this gene, and a 35 kD 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. [provided by RefSeq, Jul 2008]

Uniprot Description

Function: Cytokine that can act as a growth factor for activated T and NK cells, enhance the lytic activity of NK/lymphokine-activated killer cells, and stimulate the production of IFN-gamma by resting PBMC.1 PublicationManual assertion based on experiment in:Ref.12