1. Mass Spectrometry Group, Physics Department, CEADEN, Havana, Cuba
2. Brazilian Center for Protein Research, Department of Cell Biology, University of Brasília, Brasília, DF, Brazil
3. Departament of Chemical Physiology, SR11, The Scripps Research Institute, La Jolla, California, United States
4. Genetic and Biochemistry Institute, Federal University of Uberlandia, Uberlandia, MG, Brazil
5. Bioinformatics Lab, Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
6. Laboratory of Bioanalytical Chemistry, Chemistry Institute, University of Brasília, Brasília, DF, Brazil