Human Complement Component 4 (C4) ELISA Kit for detecting C4 in serum, plasma, tissue homogenates, cell lysates, cell culture supernates, other biological fluids. Species Reactivity: Human (Homo sapiens). Detection Range: 15.6-1,000ng/ml. Sensitivity: 6.4ng/ml. Format: 96-Well Plate. Assay Type: Double-antibody Sandwich. Detection Method: Colormetric. Assay Time: 3h. Accession Number: P0C0L4. Gene ID: 720. Restrictions: For Research Use Only. Not for use in diagnostic procedures.