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Recombinant Mouse CD8 alpha/beta Heterodimer Protein, CF

Catalog #: 11146-CD Datasheet
Analyzed by SEC-MALS
Catalog # Availability Size / Price Qty
11146-CD-050
Recombinant Mouse CD8 alpha/beta Heterodimer Protein SEC-MALS.
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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Mouse CD8 alpha/beta Heterodimer Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability of the immobilized protein to support the adhesion of Jurkat human acute T cell leukemia cells. The ED50 for this effect is 0.750-6.00 μg/mL.
Source
Human embryonic kidney cell, HEK293-derived mouse CD8 protein
Mouse CD8 alpha
(Lys28-Tyr196)
Accession # NP_033987.1		Acidic Tail6-His tag
Mouse CD8 beta
(Leu22-Thr175)
Accession # P10300.1		Basic TailFLAG
(DYKDDDDK)
N-terminusC-terminus
N-terminal Sequence
Analysis
Lys28 (CD8 alpha) & Leu22 (CD8 beta)
Structure / Form
Disulfide-linked heterodimer
Predicted Molecular Mass
28 kDa (CD8 alpha) & 27 kDa (CD8 beta)
SDS-PAGE
33-37 kDa & 45-51 kDa, under reducing conditions.

Product Datasheets

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11146-CD

Product Datasheet

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

11146-CD

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

SEC-MALS View Larger

Recombinant Mouse CD8 alpha/beta (Catalog # 11146-CD) has a molecular weight (MW) of 65.7 kDa as analyzed by SEC-MALS, suggesting that this protein is a heterodimer.  MW may differ from predicted MW due to post-translational modifications (PTMs) present (i.e. Glycosylation).

Bioactivity View Larger

Recombinant Mouse CD8 alpha/beta Heterodimer Protein (Catalog # 11146-CD) supports the adhesion of Jurkat human acute T cell leukemia cells. The ED50 for this effect is 0.750-6.00 μg/mL.

Background: CD8

CD8, also known as Ly2 or Leu2, is a heterodimeric glycoprotein (alpha and beta subunits) that functions in conjunction with the T cell receptor in the recognition of MHC class I/peptide complexes (1, 2). CD8 alpha is expressed on double positive (CD4+ CD8+) thymocytes and mature CD8+ cytolytic T cells (CTL) (3-5), intraepithelial lymphocytes (IEL) (6), some gamma δ T cells (7), subsets of thymic and splenic dendritic cells (DC) (8), and peritoneal mast cells (9). It can form disulfide linked homodimers or heterodimers with CD8 beta (10). Thymic CD8+ DC express primarily alpha beta  heterodimers, while splenic CD8+ DC primarily express alpha alpha  homodimers (8). CD8 alpha + DC can present viral antigenic peptides in complex with MHC I and prime CTL responses (11). 

References
  1. Laugel, B. et al. (2011) J. Leukoc. Biol. 90:1089.
  2. Cole, D.K. et al. (2012) Immunology 137:139.
  3. Germain, R.N. (2002) Nat. Rev. Immunol. 2:309.
  4. Ledbetter, J.A. et al. (1980) J. Exp. Med. 152:280.
  5. Nakayama, K. et al. (1994) Science 263:1131.
  6. Wang, J. and J.R. Klein (1994) Science 265:1860.
  7. MacDonald, H.R. et al. (1990) Eur. J. Immunol. 20:927.
  8. Vremec, D. et al. (1992) J. Exp. Med. 176:47.
  9. Lin, T.J. et al. (1998) J. Immunol. 161:6265.
  10. Snow, P.M. and C. Terhorst (1983) J. Biol. Chem. 258:14675.
  11. Belz, G.T. et al. (2004) J. Immunol. 172:1996.
Entrez Gene IDs
925 (Human); 12525 (Mouse); 24930 (Rat); 102124337 (Cynomolgus Monkey); 493799 (Feline)
Alternate Names
CD_antigen: CD8a; CD8 antigen, alpha polypeptide (p32); CD8; CD8a molecule; CD8A; Leu2 T-lymphocyte antigen; LEU2; MAL; OKT8 T-cell antigen; p32; T cell co-receptor; T8 T-cell antigen; T-cell antigen Leu2; T-cell surface glycoprotein CD8 alpha chain; T-lymphocyte differentiation antigen T8/Leu-2

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