1. Department of Chemistry, University of Illinois at UrbanaChampaign, 600 South Mathews Avenue, Urbana, Illinois 61801, Laboratoire de Genomique Fonctionnelle des Trypanosomatides, UMF-CNRS 5162, Université Bordeaux 2, 146, Rue Léo Saignat, 33000 Bordeaux, France, and Center for Tropical and Global Emerging Diseases and Department of Cellular Biology, University of Georgia, Athens, Georgia 30602