Cat: HF-1012
Cat: HF-1012
IL12, Human, HEK293 Cells,Tag Free: Product Information
Human IL12; hIL-12, recombinant IL12, interleukin 12
P29460 (IL-12p40), P29459 (IL-12p35)
Human embryonic kidney cell, HEK293-derived human IL12 proteinIL-12 p40 (Ile23-Ser328), IL-12 p35 (Arg23-Ser219)
22.5 kDa + 34.7 kDa
Solution protein
Dissolved in sterile PBS buffer.
This solution can be diluted into other aqueous buffers. Centrifuge the vial prior to opening.
Avoid repeated freeze-thaw cycles.
It is recommended that the protein be aliquoted for optimal storage.
12 months from date of receipt, -20 to -70 °C as supplied.
Shipping with dry ice.
> 95%, determined by SDS-PAGE.
<0.010 EU per 1 ug of the protein by the LAL method.
Measured in a cell proliferation assay using PHA-stimulated human T lymphoblasts. The EC50 for this effect is 4-40 pg/mL
IL12, Human, HEK293 Cells,Tag Free:SDS-PAGE & Bioactivity
Recombinant human IL12 (Catalog # HF-1012) stimulates cell proliferation in PHA-activated human T lymphoblasts
Size-exclusion chromatography of recombinant human IL12 protein (280 nm absorbance)
2 ug/lane protein was resolved with SDS-PAGE under non-reducing (NR) and reducing (R) conditions and visualized by Coomassie Blue staining.
IL12, Human, HEK293 Cells,Tag Free:Synonyms
Human IL12; hIL-12, recombinant IL12, interleukin 12
IL12, Human, HEK293 Cells,Tag Free:Background
Interleukin-12 (IL-12), also known as natural killer cell stimulatory factor (NKSF) or cytotoxic lymphocyte maturation factor (CLMF), is a pleiotropic
cytokine originally identified in the medium of activated human B lymphoblastoid cell lines (1). The p40 subunit of IL-12 has been shown to have extensiveamino acid sequence homology to the extracellular domain of the human IL-6 receptor while the p35 subunit shows distant but significant sequence
similarity to IL-6, G-CSF, and chicken MGF (2, 3). These observations have led to the suggestion that IL-12 might have evolved from a cytokine/soluble receptor complex. Human and murine IL-12 share 70% and 60% amino acid sequence homology in their p40 and p35 subunits, respectively. IL-12
apparently shows species specificity with human IL-12 reportedly showing minimal activity in the murine system. IL-12 is produced by macrophages and B lymphocytes and has been shown to have multiple effects on T cells and natural killer (NK) cells (4). These effects include inducing production of IFN-rand TNF by resting and activated T and NK cells, synergizing with other IFN-gamma inducers at both the transcriptional and post-transcriptional levels. This interaction induces IFN-gamma gene expression, enhancing the cytotoxic activity of resting NK and T cells, inducing and synergizing with IL-2 in the generation of lymphokine-activated killer (LAK) cells, acting as a co-mitogen to stimulate proliferation of resting T cells, and inducing proliferation of
activated T and NK cells (5). Current evidence indicates that IL-12, produced by macrophages in response to infectious agents, is a central mediator of
the cell-mediated immune response by its actions on the development, proliferation, and activities of TH1 cells. In its role as the initiator of cell-mediated
immunity, it has been suggested that IL-12 has therapeutic potential as a stimulator of cell-mediated immune responses to microbial pathogens,
metastatic cancers, and viral infections such as AIDS.
1. Gubler, U. et al. (1991) Proc. Natl. Acad. Sci. 88:4143.
2. Gearing, D. et al. (1991) Cell 66:9.
3. Merberg, D. et al. (1992) Immunology Today 13:78.
4. Wolf, S.F. et al. (1991) Journal of Immunology 146:3074.
5. Airoldi, I. et al. (2000) Journal of Immunology 165:6880.
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