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Description
B7-H3/CD276 Fc Chimera Protein, HumanProduct Specification Species Human Synonyms B7 homolog 3 (B7 H3), CD276, B7 homolog 3 Accession Q5ZPR3 2 Amino Acid Sequence Leu29 Pro245, with C terminal Human IgG1 Fc Expression System HEK293 Molecular Weight 60 70kDa Purity 95% by SDS PAGE Endotoxin <0. 1EU g Conjugation Unconjugated Tag Human Fc Tag Physical Appearance Lyophilized Powder Storage Buffer PBS, pH7. 4 Reconstitution Reconstitute at 0. 1 1 mg ml according to the size in ultrapure
Product Specification
| Species | Human |
| Synonyms | B7 homolog 3 (B7-H3), CD276, B7 homolog 3 |
| Accession | Q5ZPR3-2 |
| Amino Acid Sequence | Leu29-Pro245, with C-terminal Human IgG1 Fc |
| Expression System | HEK293 |
| Molecular Weight | 60-70kDa |
| Purity | ＞95% by SDS-PAGE |
| Endotoxin | <0.1EU/μg |
| Conjugation | Unconjugated |
| Tag | Human Fc Tag |
| Physical Appearance | Lyophilized Powder |
| Storage Buffer | PBS, pH7.4 |
| Reconstitution | Reconstitute at 0.1-1 mg/ml according to the size in ultrapure water after rapid centrifugation. |
| Stability & Storage |
· 12 months from date of receipt, lyophilized powder stored at -20 to -80℃. · 3 months, -20 to -80℃ under sterile conditions after reconstitution. · 1 week, 2 to 8℃ under sterile conditions after reconstitution. · Please avoid repeated freeze-thaw cycles. |
| Reference | 1. A I Chapoval et al. B7-H3: a costimulatory molecule for T cell activation and IFN-gamma production.Nat Immunol. 2001 Mar;2(3):269-74. |
Background
B7 homolog 3 (B7-H3, CD276) is a member of the B7 family of cell surface ligands that regulate T cell activation and immune responses. B7-H3 protein contains two extracellular Ig-like V-type domains and two IgG-like C2-type domains, a transmembrane domain, and a short intracellular domain. Early research examining the biological process of B7-H3 suggested that B7-H3 is a positive regulator of T cell response. Subsequent research studies indicated that B7-H3 is a negative regulator of T cell response, and that the protein inhibits T cell proliferation. One possibility is that B7-H3 interacts with two distinct sets of receptors, resulting in seemingly opposite biological outcomes. B7-H3 is expressed by antigen presenting cells, activated T cells, and a few normal tissues, including placenta and prostate. Expression of B7-H3 is seen in several cancer types, including prostate, breast, colon, lung, and gastric cancers, and in endothelial cells from tumor associated vasculature.
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