1. Institute
of Organic Chemistry and Biochemistry, Academy of Science of the Czech Republic v.v.i., Flemingovo nám. 2, 166 10 Praha 6, Czech Republic
2. Charles University in Prague, Faculty of Science,
Department of Biochemistry, Hlavova 8, 128 43 Praha 2, Czech Republic
3. York
Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, United Kingdom