1. Department of Crystallography; Faculty of Chemistry; A. Mickiewicz University; Poznan Poland
2. Department of Macromolecular Physics; Faculty of Physics; A. Mickiewicz University; Poznan Poland
3. Howard Hughes Medical Institute; University of Texas Southwestern Medical Center; Dallas TX USA
4. Center for Biocrystallographic Research; Institute of Bioorganic Chemistry; Polish Academy of Sciences; Poznan Poland