Recombinant Cotton Rat CD8 alpha Protein, CF

Catalog #: 9648-CD 1 Review Datasheet

Catalog #	Availability	Size / Price	Qty
9648-CD-050

All CD8 Proteins and Enzymes

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Summary Product Datasheets Carrier Free Reconstitution Calculator Background Related Research Areas

Recombinant Cotton Rat CD8 alpha Protein, CF Summary

Product Specifications

Purity

>90%, 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

Bioassay data are not available.

Source

Mouse myeloma cell line, NS0-derived cotton rat CD8 protein
Ser24-Asp182, with a C-terninal 6-His tag

Accession #

AAL55392

N-terminal Sequence
Analysis

Ser24

Predicted Molecular Mass

18 kDa

SDS-PAGE

26-32 kDa, reducing conditions

Product Datasheets

9648-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.

9648-CD

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 250 μg/mL in PBS.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.

Background: CD8

CD8 is a dimeric complex made up of two Ig superfamily members (1). The CD8 alpha chain is a type I transmembrane glycoprotein that can dimerize either with itself forming CD8 alpha alpha, or with a 30-35 kDa CD8 beta chain, forming CD8 alpha beta (2). CD8 alpha contains one V-type Ig-like domain in its extracellular region that binds to class I MHC molecules. CD8 alpha beta is a TCR co-receptor, while CD8 alpha alpha promotes T cell survival and differentiation (1, 3). The mature cotton rat CD8 alpha consists of a 159 amino acid (aa) extracellular domain (ECD), and runs at ~30 kDa under reduced condition. Within the ECD, cotton rat CD8 alpha shares 49%, 47%, and 54% amino acid sequence identity with human, mouse, and rat CD8 alpha, respectively.

References

Laugel, B. et al. (2011) J. Leukoc. Biol. 90:1089.
Snow, P.M. and C. Terhorst (1983) J. Biol. Chem. 258:14675.
Cole, D.K. et al. (2012) Immunology 137:139.

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