1. Groningen Biomolecular Sciences and Biotechnology (GBB) Institute and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
2. Faculty of Science, University of South Bohemia, Czech Republic, and Institute of Nanobiology and Structural Biology GCRC ASCR, v.v.i. Nove Hrady, Czech Republic