“… caffeic acid that inhibited reversibly 50% of … different GST isoenzymes towards 1-chloro-2,4-dinitrobenzene (CDNB) (I50 values) were 58 (GST 4-4), 360 (GST 3-3) and 470 microM (GST 7-… than 640 microM for GST isoenzymes of the alpha class (GST 1-1 and 2-2).”