the quantitative structure-activity relationships ( qsars ) for polychlorinated biphenyl ( pcb ) congeners have been determined by comparing the ec50 values for three in vitro test systems , namely , aryl hydrocarbon hydroxylase ( ahh ) and ethoxyresorufin o-deethylase ( erod ) induction in rat hepatoma h-4-ii-e cells and competitive binding avidities to the rat cytosolic receptor protein ( using 2,3,7,8-tetrachlorodibenzo-p-dioxin as a radioligand ) .
C0003927
aryl hydrocarbon hydroxylase
C0059735
ethoxyresorufin o-deethylase