1. Laboratório Especial de Ciclo Celular - Center of Toxins, Immune-Response and Cell Signaling - CeTICS; Instituto Butantan; São Paulo SP 05503-900 Brazil
2. Departamento de Bioquímica, Instituto de Química; Universidade de São Paulo; São Paulo SP 05508-000 Brazil
3. Stowers Institute for Medical Research; Kansas City MO 64110 USA
4. Department of Pathology and Laboratory Medicine; University of Kansas Medical Center; Kansas City KS 66045 USA