Components: Human Procalcitonin Antibody-coated ELISA Plate (Item A); Lyophilized Human Procalcitonin Protein Standard (Item C); Biotinylated Human Procalcitonin Detection Antibody (Item F); ELISA 1X Assay/Sample Diluent Buffer A (Item D1); ELISA 5X Assay/Sample Diluent Buffer B (Item E1); ELISA 5X Assay/Sample Diluent Buffer D (Item K); HRP-Streptavidin (Item G); ELISA Stop Solution (Item I); ELISA Colorimetric TMB Reagent (HRP Substrate, Item H); 20X Wash Buffer (Item B)