1. From the Vascular Biology Center, Department of Physiology, Medical College of Georgia, Augusta, Ga, and Department of Physiology, Tulane University School of Medicine, New Orleans, La (J.D.I. and X.Z.); Departments of Medicine and Biochemistry, Division of Nephrology, Vanderbilt University School of Medicine (J.H.C.), Nashville, Tenn; and Department of Entomology and the University of California at Davis Cancer Center, University of California at Davis (C.M., B.D.H.), Davis, Calif.