Comment on

• A single myosin head moves along an actin filament with regular steps of 5.3 nanometres.

  Kitamura K, Tokunaga M, Iwane AH, Yanagida T. Kitamura K, et al. Nature. 1999 Jan 14;397(6715):129-34. doi: 10.1038/16403. Nature. 1999. PMID: 9923673
• The motor protein myosin-I produces its working stroke in two steps.

  Veigel C, Coluccio LM, Jontes JD, Sparrow JC, Milligan RA, Molloy JE. Veigel C, et al. Nature. 1999 Apr 8;398(6727):530-3. doi: 10.1038/19104. Nature. 1999. PMID: 10206648