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Product Details
Synonym
CD80, B7, B7-1, B7.1, BB1, CD28LG, CD28LG1, LAB7
Source
Human B7-1, Mouse IgG2a Fc Tag (B71-H52A4) is expressed from human 293 cells (HEK293). It contains AA Val 35 - Asn 242 (Accession # P33681-1).
Predicted N-terminus: Val 35
Request for sequenceMolecular Characterization
Other Tags and Version Biotin & Other Labeled Version
This protein carries a mouse IgG2a Fc tag at the C-terminus.
The protein has a calculated MW of 50.9 kDa. The protein migrates as 65-85 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
Endotoxin
Less than 0.01 EU per μg by the LAL method / rFC method.
Purity
>95% as determined by SDS-PAGE.
>95% as determined by SEC-MALS.
Formulation
Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5 with trehalose as protectant.
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:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
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Performance Data
SDS-PAGE
Human B7-1, Mouse IgG2a Fc Tag 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 B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) is more than 95% and the molecular weight of this protein is around 120-155 kDa verified by SEC-MALS.
Report
Bioactivity-ELISA
Immobilized Human CTLA-4, His Tag (Cat. No. CT4-H5229) at 1 μg/mL (100 μL/well) can bind Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) with a linear range of 2-31 ng/mL (QC tested).
Protocol
Immobilized Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) at 5 μg/mL (100 μL/well) can bind Human PD-L1, Fc Tag (Cat. No. PD1-H5258) with a linear range of 0.01-0.313 μg/mL (Routinely tested).
Protocol
Serial dilutions of Ipilimumab were added into Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4): Biotinylated Human CTLA-4, Fc,Avitag (Cat. No. CT4-H82F3) binding reactions. The half maximal inhibitory concentration (IC50) is 0.8402 μg/mL (Routinely tested).
Protocol
Immobilized Biotinylated Mouse CD28, His,Avitag (Cat. No. CD8-M82E3) at 1 μg/mL (100 μL/well) on Streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate, can bind Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) with a linear range of 0.2-5 ng/mL (Routinely tested).
Protocol
Bioactivity-SPR
Immobilized Human / Cynomolgus / Rhesus macaque CD28, Fc Tag (Cat. No. CD8-H525a) on CM5 Chip can bind Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) with an affinity constant of 2.72 μM as determined in a SPR assay (Biacore T200) (Routinely tested).
Protocol
Bioactivity-BLI
Loaded Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) on Protein A Biosensor, can bind Human / Cynomolgus / Rhesus macaque CD28, His Tag with an affinity constant of 4.6 μM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Loaded Biotinylated Human / Cynomolgus / Rhesus macaque CD28, Fc,Avitag (Cat. No. CD8-H82F2) on SA Biosensor, can bind Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) with an affinity constant of 38.3 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).
Protocol
Bioactivity-FACS
Flow Cytometry assay shows that Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) can bind to 293 cell overexpressing human CTLA-4. The concentration of Human B7-1 is 1 μg/mL (Routinely tested).
Protocol
FACS analysis shows that the binding of Human B7-1, Mouse IgG2a Fc Tag (Cat. No. B71-H52A4) to 293 overexpressing CTLA-4 was inhibited by increasing concentration of neutralizing Anti-human CTLA-4 antibody. The concentration of Human B7-1 is 1 μg /mL. The IC50 is 5.5 μg/mL (Routinely tested).
Protocol
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Background
B-lymphocyte activation antigen B7-1 (referred to as B7) also known as cluster of Differentiation 80 (CD80), is a member of cell surface immunoglobulin superfamily and is expressed on activated B cells, activated T cells, macrophages and dendritic cells. It is the ligand for two different proteins on the T cell surface: CD28 (for autoregulation and intercellular association) and CTLA-4 (for attenuation of regulation and cellular disassociation). CD80 works in tandem with CD86 to prime T cells. CD80 plays a role in induction of innate immune responses by activating NF-κB-signaling pathway in macrophages. CD80 is thus regarded as promising therapeutic targets for autoimmune diseases and various carcinomas.
Recent Advances
Drug Development Progress- English Name：
Cluster of differentiation 80
- Category：
- Approved Drugs：
2 Details
- Drugs in Clinical Trials：
10 Details
- Highest Development Stage：
Approved
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