Oda Brandstrup and Ion Channel SNDX-275 Pedersen are thanked for logistic assistance

DanScatt is thanked for financial assistance. The skilful help of Piotr Binczyckiin in preparing the TEM pictures is gratefully acknowledged. SNDX-275 This operate was partially supported by the Marie Curie Initial Training Network,HARVEST, sponsored by the 7th Framework System of the European Union and by the Hungarian Scientific Research Fund/National Office for Study and Technologies grants to G.G, National Workplace for Research and Technological innovation grant to L.R. and Bourse du Gouvernement Fran?ais to G.N.