1. Department of Biophysics, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8816, United States
2. Faculty of Agronomy and Bioengineering, University of Life Sciences, Wojska Polskiego 28, 60-624 Poznan, Poland
3. Biomedical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
4. Department of Molecular Machines and Signaling, Max Planck Institute for Biochemistry, Am Klopferspitz 18, D-82152 Martinsried, Germany