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Enzymatic properties of At myosin XI-MDs. (A) Vmax of actin-activated ATPase activity for XI-MDs at 25 mM KCl. (B) Km of the actin-activated ATPase activity of XI-MDs at 25 mM KCl. (C) Duty ratio of the At myosin XI motor domains (XI-MDs). The duty ratio is estimated from the Vmax values of actin-activated ATPase activities and the actin sliding velocities of the MD (see Materials and Methods).
