The liver DNA breaks and repair of the fish (carassius auratus) induced by the sublethal metal mixture

The breaks and repair of the carassius auratus's liver DNA induced by the metal mixture were studied by using the gel electrophoresis technique and 3H-TdR incorporation experiment. The results demonstrated that DNA breaks were detected after treated by zine, lead and metal mixture, and the RNSB order was the metal mixture >Pb>Zn. The DNA repair was found among the zinc treatment, cadmium treatment, lead treatment as well as metal mixture treatment, and the order of the repair ability was the metal mixture >Pb>Zn>Cd. The mixture of the metals increased the damage to the DNA. The results also showed that the result of the DNA breaks was not conformed completely to that of the DNA repair