1. Centre
for Membrane Pumps in Cells and Disease (PUMPkin), Danish National
Research Foundation, Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus C, Denmark
2. Department
of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
3. Division
of Chemistry and Chemical Engineering and Howard Hughes Medical Institute, California Institute of Technology, Pasadena, California 91125, United States
4. Department
of Experimental Medical Science, Lund University, Sölvegatan 19, SE-221 84 Lund, Sweden