Abstract
Metabolism of metals was assessed in populations of Mytilus edulis exposed to metals in the laboratory and in the field. Chronic exposure to metals in both environments resulted in increased concentrations of metals in both the low molecular weight metal-binding protein fraction, which contains metallothioneins, and in the high molecular weight metal-binding protein fraction, which contains metalloenzymes. Our results from analysis of laboratory-exposed populations and from monitoring indigenous and transplanted populations indicate that the capacity for production of metallothioneins is limited and that the quantities present differ greatly with seasonal changes in the environment.
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