1. Departamento de Fisiologia e Biofisica, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
2. Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense 5230, Denmark
3. Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
4. Departamento de Bioquimica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil