B7-2 Fc Recombinant Protein

• Background:

  B7-1 and B7-2 are transmembrane glycoproteins of the immunoglobulin superfamily that are expressed, along with the receptors CD28 and CTLA-4, by antigen-presenting cells, and along with these receptors, constitute crucial co-stimulatory pathways for T and B cell regulatory responses. As members of the B7 family, B7-1 and B7-2 play principal roles in immunity, activating immune response and maintaining immune tolerance through engagement with CD28 and CTLA-4. Co-stimulatory signals generated by B7-1 and B7-2 interactions with CD28 serve to stimulate T cell activation and prevent anergy through the amplification of T cell receptor (TCR) signaling. In contrast, interactions of the ligands with CTLA-4 serves to maintain T cell homeostasis and self-tolerance through the disruption of stimulatory signaling from B7 isoform bound CD28 complexes, and by inducing powerful inhibitory signals in T cells. B7-1 plays an important role in immune response through its amplification and regulation of T cell activity at peripheral inflammation sites. B7-1, like CTLA-4, is, however, only poorly expressed on resting dendritic cells, and its up-regulation is, therefore, considerably delayed upon immune activation. Conversely, B7-2 and CD28 are constitutively expressed by resting hematopoietic and T cells, respectively, and as a result are able to rapidly induce up-regulation upon immune activation, making them critical to the early co-stimulatory signaling of immune response. Both B7-1 and B7-2 have been shown to demonstrate co-stimulatory activity in T cell proliferation in vitro and elicit enhanced antitumor immune response in vivo. Recombinant Human B7-2Fc is a homodimeric B7-2 fusion protein, whose monomer contains a total of 453 amino acid residues, consisting of 222 amino acid residues corresponding to the extracellular domain of human B7-2, fused to the Fc portion of human IgG1. The calculated molecular weight of the B7-2 Fc monomer is 51.2 kDa.

• NCBI Gene ID:

  12524

• Swiss Prot:

  P42082

• Type:

  Recombinant Proteins

• Source:

  CHO cells

• Field of Research:

  Immunology, Cancer

• Purity:

  ≥ 95% by SDS-PAGE gel and HPLC analyses.

• Shipping Conditions:

  Room Temp

• Storage Conditions:

  The recombinant protein is stable for at least 2 years from date of receipt at -20˚ C. Reconstituted protein is stable for at least 3 months when stored in working aliquots with a carrier protein at -20˚ C. As with any protein, exposing the recombinant protein to repeated freeze / thaw cycles is not recommended. When working with proteins care should be taken to keep recombinant protein at a cool and stable temperature.

• NCBI Official Name:

  CD86 antigen

• NCBI Organism:

  Homo sapiens

• Other Product Names:

  B70, CD86, ETC1

• Species:

  Human

• Physical Properties:

  Lyophilized

• CAS Number:

  9000-83-3