1 Department of Molecular, Cellular and Developmental Biology and Program in Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
2 Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.
3 Cardiovascular Research Institute, University of California, San Francisco, CA 94158, USA; Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158, USA.
4 Cardiovascular Research Institute, University of California, San Francisco, CA 94158, USA; Departments of Biochemsitry and Biophysics, and Cellular and Molecular Pharmacology, University of California, San Francisco, CA 94158, USA; California Institute for Quantiative Biomedical Research, University of California, San Francisco, CA 94158, USA; Kavli Institute for Fundamental Neuroscience University of California, San Francisco, CA 93858-2330, USA; Molecular Biophysics and Integrated Bio-imaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Electronic address: daniel.minor@ucsf.edu.