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Product Details
Synonym
CD28, Tp44
Source
Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (CD8-H82E5) is expressed from human 293 cells (HEK293). It contains AA Asn 19 - Pro 152 (Accession # P10747-1). In the region Asn 19 - Pro 152, the AA sequence of Human, Cynomolgus and Rhesus macaque CD28 are homologus.
Predicted N-terminus: Asn 19
Request for sequenceMolecular Characterization
Other Tags and Version Biotin & Other Labeled Version
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 18.7 kDa. The protein migrates as 33-45 kDa under reducing (R) condition, and 55-80 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.
The protein is designed as a dimer.
Labeling
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
Protein Ratio
Passed as determined by the HABA assay / binding ELISA.
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 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
Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag 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 90% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (Cat. No. CD8-H82E5) is more than 95% and the molecular weight of this protein is around 63-77 kDa verified by SEC-MALS.
Report
Bioactivity-ELISA
Immobilized Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (Cat. No. CD8-H82E5) at 1 μg/mL (100 μL/well) on Streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Human B7-1, Fc Tag (Cat. No. B71-H5259) with a linear range of 0.2-3 ng/mL (QC tested).
Protocol
Immobilized Monoclonal Anti-Human CD28 Antibody, Mouse IgG1 at 5 μg/mL (100 μL/well) can bind Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (Cat. No. CD8-H82E5) with a linear range of 0.08-2 ng/mL (Routinely tested).
Protocol
Immobilized Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (Cat. No. CD8-H82E5) at 1 μg/mL (100 μL/well) on Streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Human B7-2, Fc Tag (Cat. No. CD6-H5257) with a linear range of 9-78 ng/mL (Routinely tested).
Protocol
Immobilized Biotinylated Human / Cynomolgus / Rhesus macaque CD28, His,Avitag (Cat. No. CD8-H82E5) at 1 μg/mL (100 μL/well) on Streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Monoclonal Anti-Human CD28 Antibody, Mouse IgG1 with a linear range of 0.04-1 ng/mL (Routinely tested).
Protocol
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Background
Recent Advances
Drug Development Progress- English Name：
T-cell-specific surface glycoprotein CD28
- Category：
- Approved Drugs：
0 Details
- Drugs in Clinical Trials：
31 Details
- Highest Development Stage：
Phase 2 Clinical
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