Recombinant Human B7 Homolog 4/B7-H4/VTCN1 (C-Fc-Avi) Biotinylated

B7 Homolog 4 (B7-H4) is glycosylated member of the B7 family of immune costimulatory proteins. Mature human B7-H4 consists of a 235 amino acid (aa) extracellular domain (ECD) with two Ig-like V-type domains, a 21 aa transmembrane segment, and a 2 aa cytoplasmic tail. It is widely expressed, including in kidney, liver, lung, pancreas, placenta, prostate, spleen, testis and thymus. B7-H4 negatively regulates T-cell-mediated immune response by inhibiting T-cell activation, proliferation, cytokine production and development of cytotoxicity. When expressed on the cell surface of tumor macrophages, plays an important role, together with regulatory T-cells (Treg), in the suppression of tumor-associated antigen-specific T-cell immunity. It also involved in promoting epithelial cell transformation.

B7-H4; B7H4T-cell costimulatory molecule B7x; B7S1; B7S1VCTN1; B7XPRO1291; B7h.5; B7x; FLJ22418; Immune costimulatory protein B7-H4; Protein B7S1; T cell costimulatory molecule B7x; V-set domain containing T cell activation inhibitor 1; V-set domain-containing ; Vtcn1

Immobilized Anti-Human B7-H4 mAb at 2μg/ml (100 μl/well) can bind Biotinylated Human B7-H4-Fc-Avi. The ED50 of Biotinylated Human B7-H4-Fc-Avi is 0.23 ng/ml.

Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.