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Cryoelectron micrographs of actin filaments decorated with variants of Acanthamoeba myosin, AMIC. (a) constitutively active mutant, S329E, rigor state; (b) constitutively inactive mutant, S329A, rigor state; (c) constitutively active mutant, S329E, ADP-bound state. (Bar = 500 Å.)
