Synonyms :  ICOS; CD278; Inducible T Cell Costimulator; CRP1; CD28-related Protein-1; AILIM ; CVID1   
Host :  CHO cell 
Sequence :  The extracellular domain  of human CD278 [ICOS](NP_036224.1)(Glu21-Leu139) is fused to the N-terminus of the Fc region of human IgG1. 
Molecular Mass:  40 KDa (monomer) 
Purity :  >98%，by SDS-PAGE under reducing conditions.  
Endotoxin Content :  <0.06 EU/μg as determined by LAL test. 

Activity:  Measured by its ability to inhibit human T cell proliferation induced by rhB7-H2/Fc Chimera in the presence of anti-CD3.  
Formulation :  Lyophilized from 0.2μm-filtered solution in PBS. 
Reconstitution :  Reconstitute at 100μg/ml in sterile PBS. 
Use / Stability :  
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. 
Avoid freeze/thaw cycles.