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Your Position: Home > Cytokines > IL-12B & IL-12A > IL2-H4210

Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag

INTRODUCTION

QC & Assay Protocol

Citation & Background

Synonym
IL12,p70,Interleukin-12
Source
Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag (IL2-H4210) is expressed from human 293 cells (HEK293). It contains AA Ile 23 - Ser 328 (IL-12B) and Arg 23 - Ser 219 (IL-12A) (Accession # P29460-1 (IL12B) and P29459-1 (IL12A)).
Predicted N-terminus: Ile 23 (IL12B) and Arg 23 (IL12A)
Request for sequence
Molecular Characterization
Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag is produced by co-expression of IL-12B and IL-12A, has a calculated MW of 36.6 kDa (IL-12B) and 23.8 kDa (IL-12A). Subunit IL-12B is fused with polyhistidine tag at the C-terminus and subunit IL-12A is fused with flag tag at the C-terminus. The predicted N-terminus is Ile 23 (IL12B) and Arg 23 (IL12A). The reducing (R) heterodimer protein migrates as 43 kDa and 45 kDa (IL12B) and 35-40 kDa (IL12A) respectively due to glyosylation.
Endotoxin
Less than 1.0 EU per μg by the LAL method.
Purity
>90% as determined by SDS-PAGE.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
1. -20^°C to -70^°C for 12 months in lyophilized state;
2. -70^°C for 3 months under sterile conditions after reconstitution.

SDS-PAGE

Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.

Bioactivity-ELISA

Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag TagHuman IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag (Cat. No. IL2-H4210) ELISA bioactivity

Immobilized Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag (Cat. No. IL2-H4210) at 0.5 μg/mL (100 μL/well) can bind Anti-IL23A & IL12B MAb (P40 domain) with a linear range of 0.2-2 ng/mL (QC tested).

Request for protocol

Immobilized Biotinylated Human IL-12 R beta 1, Fc,Avitag (Cat. No. ILB-H82F7) at 1 μg/mL (100 μL/well) on streptavidin precoated (0.5 μg/well) plate, can bind Human IL-12B&IL-12A Heterodimer Protein, His Tag&Flag Tag (Cat. No. IL2-H4210) with a linear range of 0.039-0.625 μg/mL (Routinely tested).

Request for protocol

Background
Interleukin 12 (IL12) is also known as p70, and is an interleukin that is naturally produced by dendritic cells, macrophages and human B-lymphoblastoid cells (NC-37) in response to antigenic stimulation.IL12 is a heterodimeric cytokine, containing IL-12A (p35) and IL-12B (p40). 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 IFN-γ and TNF-α from T cells and NK cells, and reduces IL-4 mediated suppression of IFN-γ. IL-12 plays an important role in the activities of natural killer cells and T lymphocytes. IL-12 also has anti-angiogenic activity, which means it can block the formation of new blood vessels.
References
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.