1. Chemistry Department Lomonosov Moscow State University Leninskie Gory 1/3 Moscow 119991 Russia
2. Pushchino Branch, Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences Prospekt Nauki 6, Pushchino Moscow 142290 Russia
3. Museum of Natural History “Felipe Poey”, Faculty of Biology University of Havana Havana Cuba
4. Center for Protein Studies, Faculty of Biology University of Havana Havana Cuba
5. Mass Spectrometry Laboratory, Department of Proteomics Center for Genetic Engineering and Biotechnology PO Box 6162 Havana Cuba