Chapter 35. Chapter 35

Introduction

Although the myosin–actin interaction is typically associated with contractile movement, some forms of myosin are involved in moving cargo throughout the cell. The following data pertain to a myosin molecule moving a 6 μm-diameter vesicle along an actin track in the aqueous environment of the cytoplasm (viscosity = 0.01 g cm^-1 s^-1). The myosin undergoes five ATP hydrolysis cycles per second, moving 110 Å per cycle.