1. From the Department of Chemistry and Biochemistry, Ohio University (L.K., T. Malinski), Athens, Ohio; Department of Laboratory Medicine, Medical University of Gdansk, and the Laboratory of Cellular and Molecular Nephrology, Medical Research Center of the Polish Academy of Science (L.K.), Gdansk; and the Department of Pharmacodynamics, Medical Academy of Bialystok (T. Matys, E.C., W.B.), Poland.