Recombinant Human CD2 Fc Chimera Protein, CF Summary
Accession # P06729
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.
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.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.|
|Reconstitution||Reconstitute at 200 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||
2 μg/lane of Recombinant Human CD2 Fc chimera was resolved with SDS-PAGE underreducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Bluestaining, showing bands at 59-65 kDa and 120-130 kDa, respectively.
T cell surface antigen CD2 is a type I glycoprotein belonging to the Ig superfamily and is expressed on T cells, NK cells, B cells and some antigen presenting cells. CD2 functions as an activator of T lymphocytes and thymocytes (1). Mature human CD2 consists of a 185 amino acid (aa) extracellular domain (ECD), a 26 aa transmembrane segment, and a 116 aa cytoplasmic tail. The extracellular domain is composed of two immunoglobulin-superfamily domains with highly-charged binding regions (2). Within the ECD, human CD2 shares 47% and 48% aa sequence identity with mouse and rat CD2, respectively. It interacts with both CD58 and CD59 directly to activate T cells and their adhesion pathways (3). The conformational flexibility of the CD2 molecule affects function through the conformational status of the adhesive ligands (4). Together with PSTPIP1, CD2 works to regulate T cell activation (5). These two proteins colocalize with a second CD2-binding protein to signal immunological synapse formation in T cells (6). CD2 is an adhesion molecule present on the cell surface of T cells, natural killer (NK) cells, and B cells; and its interaction with CD58 on antigen-presenting cells plays an important role in their immune reaction (7). CD2-CD58 interactions play a critical role in the anti-tumor immune response, and restoration of this signaling is an important strategy for anti-tumor therapy (8). Furthermore, CD2-CD58 interactions are pivotal for the activation and function of adaptive natural killer cells in human cytomegalovirus infection (9).
- Sayre, P. et al. (1987). Proc. Natl. Acad. Sci. 84:2941.
- Bodian, DL. et al. (1994) Structure. 2:755.
- Hahn, W. C. et al. (1992). Science. 256:1805.
- Yang, J. J. et al. (2001). Curr. Prot. Pept. Sci. 2:1.
- Yang, H. and Reinherz, EL. (2006). J. Immunol. 176:5898.
- Badour, K. et al. (2003). Immunity. 18:141.
- Kingma, D.W. et al. (2002) Cytometry 50:243.
- Nishikori, M. et al. (2016) J Clin Cell Immunol 7:406.
- Rolle, A. et al. (2016) Eur. J. Immunol. 46:2420.
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