Synonyms : 4-1BB; CD137; TNFRSF9 Host : CHO cell Sequence : The extracellular domain of human CD137(AAH06196.1)(Glu19-Ser184) is fused to the N-terminus of the Fc region of human IgG1. Molecular Mass: 44KDa (monomer) Purity : >98%,by SDS-PAGE under reducing conditions. Endotoxin Content : <0.06 EU/μgas determined byLAL test.Activity : Measured byits bindingabilityin a functional ELISA.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.