Molecular cloning of the cDNA of molluscan metallothioneins (MT) : Michael E. Unger,∗‡ Thomas T. Chen§ & G. Roesijadi.∗§∗ University of Maryland, Chesapeake Biological Laboratory, Box 38, Solomons, Maryland, USA; ‡ University of Maryland Program in Toxicology, Baltimore, Maryland, USA & § University of Maryland, Center of Marine Biotechnology, Baltimore, Maryland, USA