Free-energy-based method for step size detection of processive molecular motors B. Bozorgui, K. Shundyak, S. J. Cox and D. Frenkel Eur. Phys. J. E, 31 4 (2010) 411-417 Published online: 20 April 2010 DOI: 10.1140/epje/i2010-10590-6