膜杰作
Star Staining
分子别名（Synonym）
IL12,p70,Interleukin-12
表达区间及表达系统（Source）
Human IL-12 Protein, premium grade (IL2-H5210) is expressed from human 293 cells (HEK293). It contains AA Ile 23 - Ser 328 & Arg 23 - Ser 219 (Accession # P29460-1 & P29459-1).
Predicted N-terminus: Ile 23
Human IL-12 Protein, premium grade (IL2-H5210), designed for preclinical stage, has the same activity and performance with GMP Human IL-12 (GMP-L12H23), which enables a seamless transition from preclinical development to clinical phases. Premium Grade product offer a cost efficient alternative of GMP Grade products for the early development phase when safety of raw materials is not top priority. By using Premium Grade products in early development phase, you can transition easily into clinical and commercial phase without need to revalidate the raw materials and modify manufacturing process.
蛋白结构（Molecular Characterization）
This protein carries no "tag".
The protein has a calculated MW of 58.9 kDa. The protein migrates as 76 kDa±3 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 0.01 EU per μg by the LAL method.
宿主蛋白残留（Host Cell Protein）
<0.5 ng/µg of protein tested by ELISA.
宿主核酸残留（Host Cell DNA）
<0.02 ng/μg of protein tested by qPCR.
无菌（Sterility）
Negative
支原体（Mycoplasma）
Negative.
纯度（Purity）
>95% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
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 24 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Human IL-12 Protein, premium grade on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. 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-12 Protein, premium grade (Cat. No. IL2-H5210) is more than 90% and the molecular weight of this protein is around 60-80 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-Bioactivity CELL BASE
Human IL-12 Protein, premium grade (Cat. No. IL2-H5210) stimulates secretion of IFN-γ by NK-92 human natural killer lymphoma cells. The specific activity of Human IL-12 Protein, premium grade is > 1.00ⅹ10^7 IU/mg, which is calibrated against human IL-12 WHO International Standard (NIBSC code: 95/544) (QC tested).
Protocol
活性（Bioactivity）-ELISA
Immobilized Human IL-12 Protein, premium grade (Cat. No. IL2-H5210) at 5 μg/mL (100 μL/well) can bind Biotinylated Human IL-12 R beta 1, Fc,Avitag (Cat. No. ILB-H82F7) with a linear range of 0.002-0.156 μg/mL (QC tested).
Protocol
Immobilized Human IL-12 Protein, premium grade (Cat. No. IL2-H5210) at 1 μg/mL (100 μL/well) can bind Monoclonal Anti-Human IL23A&IL12B P40 domain Antibody, Human IgG1 with a linear range of 0.05-3 ng/mL (Routinely tested).
Protocol
活性（Bioactivity）-BLI
Loaded Biotinylated Human IL-12 R beta 1, Fc,Avitag (Cat. No. ILB-H82F7) on SA Biosensor, can bind Human IL-12 Protein, premium grade (Cat. No. IL2-H5210) with an affinity constant of 2.6 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
稳定性（Stability）
The Cell based assay shows batch-to-batch consistency between Acro's GMP and PG IL-12.
背景（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.
