Human ACE/Cd143 PicoKine® Quick ELISA Kit (90 minutes, 96 Tests) . Quantitate Human ACE in cell culture supernatants, serum, plasma (heparin) and saliva. Sensitivity: 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.