1. Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas, Department of Human Biological Chemistry and Genetics, UTMB, Galveston, Texas, Nencki Institute of Experimental Biology, Warsaw, Poland, Mercy Hospital Cancer Center, Pittsburgh, Pennsylvania, and Department of Internal Medicine and Department of Biochemistry & Molecular Biology, University of Arkansas for Medical Sciences and McClellan VA Medical Center, Little Rock, Arkansas