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Rat CD28 / TP44 Protein (His Tag, ECD)

CD28, TP44

Catalog Number P80302-R08H
Organism Species Rat
Host Human Cells
Synonyms CD28, TP44
Molecular Weight The recombinant rat Cd28 consists 141 amino acids and predicts a molecular mass of 16.4 kDa.
predicted N Asn 20
SDS-PAGE
Purity > 85 % as determined by SDS-PAGE.
Protein Construction A DNA sequence encoding the rat Cd28 (EDL98926.1) (Met1-Lys149) was expressed with a polyhistidine tag at the C-terminus.
Bio-activity
Research Area Immunology |Adaptive Immunity |T Cell |T Cell CD Antigen
Formulation Lyophilized from sterile PBS, pH 7.4.
1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background CD28 (Cluster of Differentiation 28) is a disulphide-bonded glycoprotein belonging to the immunoglobulin (Ig) superfamily, and structurally consists of a single Ig V-like extracellular domain, a transmembrane domain and an intracellular domain. Mouse CD28 is constitutively expressed on the surface of all murine T cells and on developing thymocytes as disulfide-linked homodimers or as monomers. CD28 can binds the B7-1 and B7-2 ligand, and together perform important functions in the T and B cell response pathways. B7/CD28 family members, which can augment or antagonize T-cell receptor signaling, in the regulation of central and peripheral T-cell tolerance. CD28 is thus involved in T-cell activation, the induction of cell proliferation and cytokine production and promotion of T-cell survival.
Reference
  • Keir ME, et al. (2005) The B7/CD28 costimulatory family in autoimmunity. Immunol Rev. 204: 128-43.
  • Sansom DM, et al. (2006) The role of CD28 and cytotoxic T-lymphocyte antigen-4 (CTLA-4) in regulatory T-cell biology. Immunol Rev. 212: 131-48.
  • Bjrgo E, et al. (2010) Novel mechanism of signaling by CD28. Immunol Lett. 129(1): 1-6.