Monkey IL-4 ELISA Kit PicoKine® (96 Tests) . Quantitate Monkey IL-4 in cell culture supernatants, serum, plasma (heparin, EDTA) . Sensitivity: 0.5pg/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.