A class of actin-based cargo motors; well-studied dimeric members coordinate their heads for processive stepping.
Coordination allows one head to remain associated while the other advances, supporting repeated motion along actin. Single-fluorophore localization experiments distinguish this alternating-head mechanism from a model in which the same head always leads. [ref]
Molecular Biology of the Cell, 4th edition by Bruce Alberts and others. Chapters 3, 6 and 15, protein function, translation and cell signalling
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