1. Centro de Biotecnologia Molecular e Estrutural (CBME), Instituto de Física de São Carlos (IFSC), Universidade de São Paulo (USP), Av. Trabalhador São Carlense 400, centro, Box 369, São Carlos, SP, 13560-970, Brazil, National Institute of Advanced Industrial Science and Technology, Higashi, Tsukuba Science City, Ibaraki 305-8565, Japan, and Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan