1. Centro de Biotecnologia, CNEN-IPEN/SP, Av. Lineu Prestes 2242, Campus USP, São Paulo, SP, Brazil, 05508-000
2. LIM-26 Faculdade de Medicina da USP-SP, São Paulo, Brazil
3. Membrane Physiology Division, Institute of Physiology 230, Hohenheim University, Stuttgart, Germany