Recombinant Human Interleukin-12 (rHuIL-12)

Official Full Name

Recombinant Human Interleukin-12 (rHuIL-12)


Natural killer cell stimulatory factor chain 2, NKSF2, Cytotoxic lymphocyte maturation factor 40 kDa subunit, CLMF p40


Squence of Recombinant Human Interleukin-12

Amino Acid Sequence

HuIL-12 p40: Ile23 – Ser328; Accession # P29460HuIL-12 p35: Arg23 – Ser219; Accession # P29459


Natural killer cell stimulatory factor chain 2, NKSF2, Cytotoxic lymphocyte maturation factor 40 kDa subunit, CLMF p40



Gene ID



IL-12 is a heterodimeric cytokine of disulfide-linked p35 and p40 subunits. It is secreted by monocytes, macrophages, dendritic cells, neutrophils, Langerhans cells, keratinocytes, microglia, and peripheral B cells. In humans, the p40 subunit can also associate with a p19 subunit to form IL-23. IL-12 signals through a receptor complex consisting of IL-12 R beta 1 and IL-12 R beta 2. It promotes Th1 immune responses by inducing IFN-gamma secretion from NK cells, T cells, and macrophages and by enhancing NK cell and T cell mediated cytotoxicity. It also cooperates with IL-18 in the generation of Th1 memory cells.


Spodoptera frugiperda, Sf21 (baculovirus)

Molecular Weight

Apparent molecular mass of 60 kDa in SDS-PAGE under non-reducing conditions, 41 kDa and 29 kDa under reducing conditions, a disulfide-linked heterodimer consisting of the 306 amino acid rHuIL-12 p40 and the 197 amino acid rHuIL-12 p35 subunits.

Biological Activity

Measured in a cell proliferation assay using PHA-stimulated human T lymphoblasts. The ED50 for this effect is 0.01-0.05 ng/mL. The specific activity of rHuIL-12 is approximately 1.1 × 104 units/ug, which is calibrated against rHuIL-12 WHO Standard (NIBSC code: 95/544).


Sterile filtered white lyophilized (freeze-dried) powder.


Lyophilized from a 0.2 um filtered concentrated solution in PBS, pH 7.2.


Less than 1.0 EU/ug of rHuIL-12 as determined by LAL method.


We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile PBS to a concentration of 0.1 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriately buffered solutions.

Stability and Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.- 12 months from date of receipt, -20 to -70 °C as supplied.- 1 month, 2 to 8 °C under sterile conditions after reconstitution.- 3 months, -20 to -70 °C under sterile conditions after reconstitution.



> 97 % by SDS-PAGE.


SDS-PAGE of Recombinant Human Interleukin-12

Pack Size


Safety Data Sheet (SDS) Download

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Technical Data Sheet (TDS) Download

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This product is branded by ChemWhat and sold through our website and here is the corresponding link Recombinant Human Interleukin-12 (rHuIL-12) on ChemWhat