Recombinant Human B7-1 (C-6His)

Recombinant Human B7-1 (C-6His)

• Background: Cluster of Differentiation 80, also called B7-1, is a member of cell surface immunoglobulin superfamily which plays key, yet distinct roles in the activation of T cells. It is the ligand for two different proteins on the T cell surface: CD28 and CTLA-4. Studies have shown that CTLA-4 binds mostly to CD80. The structure presents two extracellular domains: a membrane distal variable-like domain (IgV) and a membrane proximal Ig constant-like domain (IgC) along with an intracellular domain. Both IgV and IgC consist of anti-parallel beta sandwiches joined by a short linker region. CD80 is mostly expressed on the surface of antigen-presenting cells including activated B cells, macrophages and dendritic cells.
• Description: Recombinant Human Activation B7-1 Antigen is produced by our Mammalian expression system and the target gene encoding Val35-Asn242 is expressed with a 6His tag at the C-terminus.
• Synonyms: CD80; Activation B7-1 antigen; B7; BB1; CD28LG1; CD28LGB7-1 antigen; T-lymphocyte activation antigen CD80
• CAS Number: 9000-83-3
• UniProt: P33681
• Endotoxin: Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test.
• Purity: Greater than 95% as determined by reducing SDS-PAGE.
• Molecular Weight: 24.7 KDa
• Shipping Conditions: The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below.
• Storage Conditions: Lyophilized protein should be stored at < -20°C, though stable at room temperature for 3 weeks. Reconstituted protein solution can be stored at 4-7°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.