Figure 1.
(A) Cartoon of the myosin V on an actin filament. A quantum dot (QD) is attached to one of the IQ domains of the myosin leg. (B–F) Results of the in vitro experiments: (B) typical steplike trajectory of a single motor running on an actin filament at [ATP] = 500 nM; (C) steplike curves at [ATP] = 2 mM; step-size distribution (D), velocity (E) and processivity (F) of myosin V in vitro at [ATP] = 2mM and low illumination power.