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分子别名（Synonym）
CD86, B7-2, B70, CD28LG2, LAB72, MGC34413
表达区间及表达系统（Source）
Biotinylated Human B7-2, Fc,Avitag, premium grade (CD6-H82F5) is expressed from human 293 cells (HEK293). It contains AA Leu 26 - Pro 247 (Accession # P42081).
Predicted N-terminus: Leu 26
It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage. When ready to transition into later clinical phases, we also offer a custom GMP protein service that tailors to your needs. We will work with you to customize and develop a GMP-grade product in accordance with your requests that also meets the requirements for raw and ancillary materials use in cell manufacturing of cell-based therapies.
Request for sequence蛋白结构（Molecular Characterization）
Other Tags and Version Biotin & Other Labeled Version
This protein carries a human IgG1 Fc tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 53.8 kDa. The protein migrates as 66-90 kDa under reducing (R) condition, and 130-150 kDa under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.
标记（Labeling）
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
蛋白标记度（Protein Ratio）
Passed as determined by the HABA assay / binding ELISA.
内毒素（Endotoxin）
Less than 0.01 EU per μg by the LAL method / rFC method.
无菌（Sterility）
Negative
支原体（Mycoplasma）
Negative
纯度（Purity）
>95% as determined by SDS-PAGE.
>95% as determined by SEC-MALS.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 25 mM Arginine, 150 mM NaCl, pH7.5 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.
质量管理控制体系（QMS）
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数据展示
电泳（SDS-PAGE）
Biotinylated Human B7-2, Fc,Avitag, 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%.
SEC-MALS
The purity of Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) is more than 95% and the molecular weight of this protein is around 135-165 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-FACS
Flow Cytometry assay shows that Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) can bind to CD28 expressed on Jurkat E6.1 cells. The concentration of B7-2 used is 1.5 μg/mL (Routinely tested).
Protocol
FACS analysis shows that the binding of Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) to CD28 expressed on Jurkat E6.1 was inhibited by increasing concentration of neutralizing Anti-CD28 antibody. The concentration of B7-2 used is 1.5 μg/mL. The IC50 is 0.031 μg/mL (Routinely tested).
Protocol
Flow Cytometry assay shows that Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) can bind to 293 cell overexpressing human CTLA-4. The concentration of Human B7-2 is 2 μg/mL (Routinely tested).
Protocol
FACS analysis shows that the binding of Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) to 293 overexpressing CTLA-4 was inhibited by increasing concentration of neutralizing Anti-human CTLA-4 antibody. The concentration of Human B7-2 is 2 μg/mL. The IC50 is 1.014 μg/mL (Routinely tested).
Protocol
活性（Bioactivity）-ELISA
Immobilized Human CTLA-4, Fc Tag (Cat. No. CT4-H5255) at 5 μg/mL (100 μL/well) can bind Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) with a linear range of 19-156 ng/mL (QC tested).
Protocol
Serial dilutions of Ipilimumab were added into Human CTLA-4, Fc Tag (Cat. No. CT4-H5255): Biotinylated Human B7-2, Fc,Avitag, premium grade (Cat. No. CD6-H82F5) binding reactions. The half maximal inhibitory concentration (IC50) is 0.1701 μg/mL (Routinely tested).
Protocol
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