Recombinant Biotinylated Mouse IL-12B / NKSF2 / p40 Protein, His, Avitag™, 25µg

Background
Interleukin-12 (IL12) is also known as natural killer cell stimulatory factor (NKSF), cytotoxic lymphocyte maturation factor (CLMF) , is a heterodimeric cytokine encoded by two separate genes, IL-12A (p35) and IL-12B (p40). IL12 is naturally produced by dendritic cells, macrophages and human B-lymphoblastoid cells (NC-37) in response to antigenic stimulation. IL-12 is involved in the differentiation of naive T cells into Th0 cells and 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. Interleukin-12 subunit beta (IL12B) also known as NKSF2, CLMF2 and P40. Interleukin-12 subunit beta has been shown to interact with IL23. A large excess of monomeric IL12B is also secreted by the cells producing IL12, and exhibits no demonstrable biological activity. Overexpression of IL12B gene has been shown to be associated with the pathogenesis of multiple sclerosis. In addition, studies have revealed that the promoter polymorphism of this gene is implicated in the severity of atopic and non-atopic asthma in children.

Source
Recombinant Biotinylated Mouse IL-12B, His,Avitag (NK2-M82E5) is expressed from human 293 cells (HEK293). It contains AA Met 23 - Ser 335 (Accession # P43432-1).
Predicted N-terminus: Met 23

Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 39.4 kDa. The protein migrates as 45 kDa,50 kDa and 55 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Biotinylation
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.

Biotin:Protein Ratio
Passed as determined by the HABA assay / binding ELISA.

Endotoxin
Less than 1.0 EU per μg by the LAL method.

Purity
>90% as determined by SDS-PAGE.
>95% as determined by SEC-MALS.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

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:
-20°C to -70°C for 12 months in lyophilized state;
-70^°C for 3 months under sterile conditions after reconstitution.

Bioactivity
Please refer to product data sheet.

Clinical and Translational Updates

(1) "Inflammatory profiles in plasma and cerebrospinal fluid of patients with neurosarcoidosis"
Byg, Illes, Sejbaek et al
J Neuroimmunol (2022) 367, 577849
(2) "Impact of smoking on cardiovascular risk and premature ageing: Findings from the STANISLAS cohort"
Rastogi, Girerd, Lamiral et al
Atherosclerosis (2022) 346, 1-9
(3) "Association of interleukin-12B gene polymorphisms and mRNA expression with preeclampsia"
Duan, Wang, Li et al
Eur J Obstet Gynecol Reprod Biol (2022) 269, 77-82
Showing 1-3 of 300 papers.