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Human CD8B / P37 / LEU2 Protein

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Human CD8B Protein Product Information
Synonym:CD8B, CD8B1
Protein Construction:A DNA sequence encoding the extracellular domain of human CD8B (P10966-1) (Met1-Pro170) was expressed with six amino acids (LEVLFQ) at the C- terminus.
Expressed Host:Human Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human CD8B Protein QC Testing
Purity:> 85 % as determined by SDS-PAGE
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Leu 22
Molecule Mass:The recombinant human CD8B comprises 156 amino acids and has a predicted molecular mass of 17.6 kDa. The apparent molecular mass of the protein is approximately 27.3 kDa in SDS-PAGE under reducing conditions.
Formulation:Lyophilized from sterile PBS, pH 7.4.
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human CD8B Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Human CD8B Protein SDS-PAGE
Human CD8B / P37 / LEU2 Protein SDS-PAGE
Other CD8B Recombinant Protein Products
CD8B / P37 / LEU2 Background

CD8B (CD8b molecule), also known as P37 and LEU2, contains 1 Ig-like V-type (immunoglobulin-like) domain. The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigens displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. P37 gene encodes the CD8 beta chain isoforms. Multiple alternatively spliced transcript variants encoding distinct membrane associated or secreted isoforms have been described. A pseudogene, also located on chromosome 2, has been identified. CD8 is thought to play a role in the process of T-cell mediated killing.

Human CD8B / P37 / LEU2 References
  • Leahy DJ, et al. (1992) Crystal structure of a soluble form of the human T cell coreceptor CD8 at 2.6 A resolution. Cell. 68(6):1145-62.
  • Gao G, et al. (2000) Molecular interactions of coreceptor CD8 and MHC class I: the molecular basis for functional coordination with the T-cell receptor. Immunol Today. 21(12):630-6.
  • Devine L, et al. (1999) Orientation of the Ig domains of CD8 alpha beta relative to MHC class I. J Immunol. 162(2):846-51.
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    Catalog: 11031-HCCH-20
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