CD278 [ICOS] (human):Fc (human) (rec.) (non-lytic)
|Synonyms||ICOS; Inducible T Cell Costimulator; CRP1; CD28-related Protein-1; AILIM|
The extracellular domain of human CD278 [ICOS] (aa 21-139) is fused to the N-terminus of the Fc region of a mutant human IgG1.
Shows the biological function of the CD278 moiety and exerts a prolonged circulating half-life caused by the modified Fc domain.
|Endotoxin Content||<0.06EU/μg protein (LAL test; Lonza).|
|Reconstitution||Reconstitute at 100μg/ml in sterile PBS.|
|Formulation||Lyophilized from 0.2μm-filtered solution in PBS.|
|Protein Negative Control|
|Other Product Data||
Non-lytic: Acts as a long lasting fusion protein which only binds to the receptor. Mutations to the complement (C1q) and FcgR I binding sites of the IgGs Fc fragment render the fusion proteins incapable of antibody directed cytotoxicity (ADCC) and complement directed cytotoxicity (CDC).
|Declaration||Manufactured by Chimerigen.|
|Shipping and Handling|
|Short Term Storage||+4°C|
|Long Term Storage||-20°C|
Avoid freeze/thaw cycles.
Centrifuge lyophilized vial before opening and reconstitution.
Stable for at least 1 year after receipt when stored at -20°C.
Working aliquots are stable for up to 3 months when stored at -20°C.
|Product Specification Sheet|
CD278, also called inducible costimulator (ICOS) or CRP1 (CD28-related protein-1), is a member of the growing CD28 family of immune costimulatory receptors. Other family members are CD28, CTLA-4 and PD-1. ICOS is expressed on most CD45RO+ cells. ICOS expression is upregulated within approximately 24-48 hours of activation on Th primed cells. B7-H2, a member of the B7 family of costimulatory ligands, has been identified as the ICOS ligand. The B7-H2/ICOS interaction appears to play roles in T cell dependent B cell activation and Th differentiation.