Affiliation: | (1) Department of Chemistry, Clarkson University, Potsdam, New York, 13699-5805;(2) Present address: University of Rochester Cancer Center, 601 Elmwood Avenue, Rochester, New York, 14642;(3) CNRS Station Biologique, BP74, 29682 Roscoff, France;(4) Department of Biology, Clarkson University, Potsdam, New York, 13699-5805 |