1. Department of Chemistry, The University of Texas-Pan American, 1201 West University Drive, Edinburg, Texas 78539, United States
2. Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Carpio y Plan de Ayala, s/n, 11340, D.F, Mexico
3. Centro de Biotecnologia Genomica, Instituto Politecnico Nacional, 88710, Reynosa, Mexico