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分子别名（Synonym）
IL-23 alpha & IL-12 beta
表达区间及表达系统（Source）
Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (ILB-H52W5) is expressed from human 293 cells (HEK293). It contains AA Arg 20 - Pro 189 (IL23A) & Ile 23 - Ser 328 (IL12B) (Accession # Q9NPF7-1 (IL23A) & P29460-1 (IL12B)).
Predicted N-terminus: His (IL23A) & Ile 23 (IL12B)
Request for sequence
蛋白结构（Molecular Characterization）
Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free, produced by co-expression of IL-23 alpha and IL-12 beta, has a calculated MW of 19.5 kDa (IL-23 alpha) and 34.7 kDa (IL-12 beta). Subunit IL-23 alpha is fused with a polyhistidine tag at the N-terminus and subunit IL-12 beta contains no tag. The reducing (R) protein migrates as 23 kDa (IL-23 alpha) & 40-45 kDa (IL-12 beta) when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（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.
存储（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.
产品数据图
电泳（SDS-PAGE）
Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) is more than 85% and the molecular weight of this protein is around 50-75 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) at 2 μg/mL (100 μL/well) can bind Monoclonal Anti-Human IL23A&IL12B P40 domain Antibody, Human IgG1 with a linear range of 0.1-1.25 ng/mL (QC tested).
Protocol
Immobilized Human IL-23 R, Fc Tag (Cat. No. ILR-H5254) at 10 μg/mL (100 μL/well) can bind Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) with a linear range of 20-78 ng/mL (Routinely tested).
Protocol
活性（Bioactivity）-SPR
Captured Human IL-23 R, Fc Tag (Cat. No. ILR-H5254) on CM5 chip via anti-human IgG Fc antibodies surface can bind Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) with an affinity constant of 5.36 nM as determined in a SPR assay (Biacore T200) (Routinely tested).
Protocol
活性（Bioactivity）-BLI
Loaded Human IL-23 R, Fc Tag (Cat. No. ILR-H5254) on Protein A Biosensor, can bind Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) with an affinity constant of 9.25 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Anti-IL23A & IL12B MAb (P40 domain) on Protein A Biosensor, can bind Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) with an affinity constant of 0.588 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Human IL-12 R beta 1, Fc Tag (Cat. No. ILB-H5255) on Protein A Biosensor, can bind Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) with an affinity constant of 1.97 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
活性（Bioactivity）-Bioactivity CELL BASE
Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) stimulates secretion of IL-17 by mouse spleen cells. The ED50 for this effect is 0.1055-0.1635 ng/mL (Routinely tested).
Protocol
Cell based assay shows that the secretion of IL-17 induced by Human IL-23A&IL-12B Heterodimer Protein, His Tag&Tag Free (Cat. No. ILB-H52W5) is inhibited by increasing concentration of the anti-human IL-23 neutralizing antibody. The IC50 is between 0.67-1.50 ng/mL (Routinely tested).
Protocol
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背景
Interleukin-23 subunit alpha (IL-23 alpha) can associates with IL12B to form the IL-23 interleukin, a heterodimeric cytokine which functions in innate and adaptive immunity. IL-23 may constitute with IL-17 an acute response to infection in peripheral tissues. IL-23 binds to a heterodimeric receptor complex composed of IL12RB1 and IL23R, activates the Jak-Stat signaling cascade, stimulates memory rather than naive T-cells and promotes production of proinflammatory cytokines. IL-23 induces autoimmune inflammation and thus may be responsible for autoimmune inflammatory diseases and may be important for tumorigenesis.
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