Human Enkephalin (ENK) ELISA Kit for detecting Enkephalin (ENK) in Serum, Plasma, Tissue Homogenates, Cell Lysates, Cell Culture Supernates, Other Biological Fluids. Species Reactivity: Human (Homo sapiens). Detection Range: 15.6-1000pg/ml. Sensitivity: 6.85pg/ml. Format: 96-Well Plate. Assay Type: Competitive inhibition. Assay Time: 4h, 30min. Restrictions: For Research Use Only. Not for use in diagnostic procedures.