Does the myosin V neck region act as a lever?

Abstract excerpt

Recent research efforts from several groups have addressed the question of whether the amplitude of myosin's unitary step size is proportional to the length of the neck region. Unconventional myosin V, which has an extended neck region with 6IQ motifs, provides a natural template by which to test the lever arm model via mutational analysis. The most stringent test requires that a series of single-headed molecules...

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