TY - RPRT TI - A stable and highly sensitive 3,3',5,5'-tetramethylbenzidine-based substrate reagent for enzyme-linked immunosorbent assays. AU - A Frey AU - B Meckelein AU - D Externest AU - M A Schmidt PY - 2000 DO - 10.1016/s0022-1759(99)00166-0 UR - https://pubmed.ncbi.nlm.nih.gov/10648855/ ID - 10648855 ER -