Recombinant human CD81 protein
CD81, also known as CD81 antigen isoform 1, belongs to the tetraspanin family. It interacts directly with immunoglobulin superfamily member 8 (IGSF8, CD316) and CD36. In B cells, it is part of a complex with CD21, CD19 and Leu13. This complex reduces the threshold for B cell activation through B cell receptors by linking Ag specific recognition and CD21 mediator recognition. On T cells it associates with CD4 and CD8 and provides a costimulatory signal with CD3. Recombinant human CD81, fused to hIgG-His-tag at C-terminus, was expressed in insect cell and purified by using conventional chromatography techniques.
Product Specifications
Product Name Alternative
CD81 antigen isoform 1, CD81, CVID6, S5.7, TAPA1, TSPAN28
Expression System
Baculovirus
Antigen Species
Human
Tag
HIgG-His-Tag
Applications
SDS-PAGE
Concentration
0.5 mg/mL (determined by absorbance at 280 nm)
Endotoxin
< 1 EU per 1ug of protein (determined by LAL method)
Purity
> 95% by SDS-PAGE
Molecular Weight
37 kDa (331aa)
Additionnal Information
References & Citations
Charrin S., et al. (2014) J. Cell. Sci. 127:3641-3648.; ; Oren, R., et al. (1990) Mol. Cell. Biol. 10:4007-4015.
Storage Conditions
Can be stored at 2°C to 8°C for 1 week. For long term storage, aliquot and store at -20C to -80C. Avoid repeated freezing and thawing cycles.
Formulation
Liquid in. Phosphate-Buffered Saline (pH 7.4) containing 10% glycerol
Scientific Category
Immunology
NCBI Accession Number
NP_004347.1
Uniprot Accession Number
P60033
Species
Human
N Terminal Sequence
Ala
AA Sequence
FVNKDQI AKDVKQFYDQ ALQQAVVDDD ANNAKAVVKT FHETLDCCGS STLTALTTSV LKNNLCPSGS NIISNLFKED CHQKIDDLFS GK
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