Human Neurotrophin-3 ELISA Kit PicoKine® (96 Tests) . Quantitate Human NTF3 in cell culture supernatants and serum. Sensitivity: 2pg/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.