Product Details
Application
Synonyms
CVID6, S5.7, TAPA1, TSPAN28
Source
Detergent Biotinylated Human CD81 Protein, His,Avitag&Flag Tag (CD1-H85D8) is expressed from Baculovirus-Insect cells. It contains AA Gly 2 - Tyr 236 (Accession # P60033).
Predicted N-terminus: Met
Request for sequenceMolecular Characterization

Other Tags and Version Biotin & Other Labeled Version
This protein carries a Flag tag at the N-terminus and a polyhistidine tag at the C-terminus followed by an Avi tag (Avitag™).
The protein has a calculated MW of 31.4 kDa. The protein migrates as 27-29 kDa under reducing (R) condition (SDS-PAGE).
*The DDM/CHS buffer (Cat. No. DC-11) is sold separately and not included in protein, you can follow the link for product information.
Structure

Each full-length transmembrane protein is encapsulated by detergent micelle.
Synthesis Process
Through mild detergent micelle extraction, dedicated solubilization, and stringent affinity purification, we maximally retain the native transmembrane conformation of full-length transmembrane proteins throughout downstream purification. This workflow yields purified, detergent-solubilized proteins free of unrelated membrane impurities and exogenous scaffold proteins, with exceptional purity, accurate quantitation, and well-preserved biological activity—ideal for immunization, binding assays in antibody discovery and screening (ELISA) and affinity testing (SPR and BLI), etc.
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
>60% as determined by SDS-PAGE.
Formulation
This product is not suitable for cell based experiments due to cytotoxicity of DDM.
DDM and CHS are INDISPENSABLE to keep membrane protein soluble and active, under no circumstances should you remove DDM and CHS.
DDM/CHS buffer (DC-11) is sold separately and not included in protein, and please contact us if you need the buffer.
If glycerol is not compatible with your application, remove glycerol just before the immediate experiment, and NEVER store glycerol-free protein solution.Supplied as 0.2 μm filtered solution in 50 mM HEPES, 150 mM NaCl, DDM, CHS, pH7.5 with glycerol as protectant.
Contact us for customized product form or formulation.
Shipping
This product is supplied and shipped with dry ice, please inquire the shipping cost.
Storage
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- The product MUST be stored at -70°C or lower upon receipt;
- -70°C for 12 months under sterile conditions.
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Performance Data
SDS-PAGE

Biotinylated Human CD81 Protein, His,Avitag&Flag Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 60%.
Bioactivity-ELISA

Immobilized Biotinylated Human CD81 Protein, His,Avitag&Flag Tag (Cat. No. CD1-H85D8) at 1 μg/mL (100 μL/well) on streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Monoclonal Anti-Human CD81 antibody, Human IgG1 with a linear range of 0.1-8 ng/mL (QC tested).
Protocol
Bioactivity-SPR

Anti-CD81 Antibody, Human IgG1 captured on Protein A Chip can bind Biotinylated Human CD81 Protein, His,Avitag&Flag Tag (Cat. No. CD1-H85D8) with an affinity constant of 251 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
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