Human Cytokeratin 18 Fragment ELISA kit (CK18-30) is a single-wash 90-min Simplestep used to quantify Human Cytokeratin 18 Fragment (CK18-30) with a sensitivity of 22,8 pg/ml. The assay uses a simple mix-wash-read protocol with just one incubation and one wash step. Colorimetric Sandwich ELISA - 450 nm readout: works on any standard plate reader.