Fig. 4From: Bioaccumulation, alterations of metallothionein, and antioxidant enzymes in the mullet Mugil cephalus exposed to hexavalent chromiumMean glutathione S-transferase (GST) activity in liver (a) and gill (b) tissues of mullet, M. cephalus, exposed to various Cr6+ concentrations for a 4-week time periodBack to article page