“…These cells express a single CYP1A isoform, which has no detectable constitutive expression . These cells also express only one AHR, an AHR2 form (Hahn, 1998;Hestermann, 1999). For EROD and CYP1A ELISA assays, cells were seeded into 96-well plates (Costar, Cambridge, MA) at 2 X 10 5 cells in 0.2 ml cu,lture medium per well.…”