Human Cellexp 4-1Bb/Tnfrsf9 Recombinant 50UG. Human Cellexp 4-1Bb/Tnfrsf9 Recombinant, Host: Purity: greater than or equal to 92% SDS-PAGE, Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 ug/ml, MW: 18.1 kDa, Synonyms: TNFRSF9,4-1BB,CD137,CDw137,ILA, Size: 50UG