1. Department of Membrane Transport BiophysicsDepartment No. 75Institute of PhysiologyPragueCzech Republic
2. Microscopy UnitInstitute of Experimental MedicineAcademy of Sciences of the Czech RepublicPragueCzech Republic
3. Institute for Molecular BiophysicsThe Jackson LaboratoryBar HarborMaineUSA
4. Department of Cell BiologyYale UniversityNew HavenConnecticutUSA