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Interindividual differences in specific activities of GST and CBR1 in rat liver. The white columns represent 6-week-old rats (J1–J6), and hatched columns indicate 21-month-old rats (S1–S6). Values are expressed as mean ± SD (six animals per age group). GST = glutathione S-transferase; CBR1 = carbonyl reductase 1.
