1 Laboratory of Cellular and Molecular Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. mmorales@biof.ufrj.br.
2 Biomembrane Laboratory, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Buenos Aires; IMBICE-CONICET, La Plata, Argentina.