Mouse sTNFsR II ELISA Kit PicoKine® (96 Tests) . Quantitate Mouse Tnfrsf1b in cell culture supernatants and serum. Sensitivity: 1pg/ml. The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.