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Human IL- 12 (IL-12A & IL-12B) protein, His Tag

Human IL- 12 (IL-12A & IL-12B) protein, His Tag

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Specification

Product name Human IL- 12 (IL-12A & IL-12B) protein, His Tag
Sequence Amino acid sequence derived from p35 subunit of human IL-12, termed as IL12A (NP_000873.2) (Met 1-Ser 219) was fused with a polyhistidine tag at the C-terminus, constructed the plasmid 1 ; Amino acid sequence derived from p40 subunit of human IL-12, termed as IL12B (NP_002178.2) (Met 1-Ser 328) was fused with a polyhistidine tag at the C-terminus, constructed the plasmid 2. The two plasmids were co-expressed and the heterodimer was purified.
Activity Measured by its ability to bind biotinylated recombinant human IL12RB1 in a functional ELISA. Measured in a cell proliferation assay using Anti-CD28 and Anti-CD3 stimulated PBMC. The ED50 for this effect is typically 0.1-0.6 ng/mL. 2. Measured in a cell proliferation assay using Anti-CD28 and Anti-CD3 stimulated PBMC. The ED50 for this effect is typically 0.1-0.6 ng/mL.
Protein length The recombinant IL12 heterodimer of human IL12A/IL12B comprises 525 (208 + 317) amino acids and has a calculated molecular mass of 60.2 (24 + 36.2) kDa. The apparent molecular mass of rh IL12 heterodimer is approximately 40 & 43 kDa respectively in SDS-PAGE under reducing conditions.
Preparation method HEK293 Cells
Purity > 95 % as determined by SDS-PAGE
Alternative CLMF; CLMF2; IL-12A; IL-12B; IL12; IMD28; IMD29; NFSK; NKSF; NKSF1; NKSF2; P35; Interleukin-12 subunit alpha & Interleukin-12 subunit beta; IL12A & IL12B

Product Properties

Formulation Lyophilized from sterile PBS, pH 7.4
Molecular weight 60.2 (24 + 36.2) kDa
Usage notes Always centrifuge tubes before opening. It is recommended to reconstitute the lyophilized Human IL- 12 (IL12A & IL12B Heterodimer) protein in sterile ddH2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
Storage instructions Lyophilized Human IL- 12 (IL12A & IL12B Heterodimer) protein product should be stored desiccated below -20°C. Upon reconstitution, the protein should be stored at 4°C between 2-7 days and for future use below -20°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please prevent freeze-thaw cycles.
Shipping The product is shipped at ambient temperature.
Precautions The product listed herein is for research use only and is not intended for use in human or clinical diagnosis. Suggested applications of our products are not recommendations to use our products in violation of any patent or as a license. We cannot be responsible for patent infringements or other violations that may occur with the use of this product.

Additional Information

Background 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 (referred to as 'p70'), and a homodimer of p40 are formed following protein synthesis.IL-12 is involved in the differentiation of naive T cells into Th1 cells. 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-γ) and tumor necrosis factor-alpha (TNF-α) from T cells and natural killer (NK) cells, and reduces IL-4 mediated suppression of IFN-γ. T cells that 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-β1 and IL-12R-β2, maintaining the expression of a critical protein involved in IL-12 signaling in NK cells. Enhanced functional response is demonstrated by IFN-γ production and killing of target cells.
Gene ID 3592/3593
Alternative CLMF; CLMF2; IL-12A; IL-12B; IL12; IMD28; IMD29; NFSK; NKSF; NKSF1; NKSF2; P35; Interleukin-12 subunit alpha & Interleukin-12 subunit beta; IL12A & IL12B
Others The Endotoxin level is less than 1.0 EU per μg of the protein as determined by the LAL method
Accession NP_000873.2/NP_002178.2

Image & description

Fig.SDS-PAGE analysis of Human IL- 12 (IL-12A & IL-12B) protein.

Fig.SDS-PAGE analysis of Human IL- 12 (IL-12A & IL-12B) protein.

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