Regulation of the smooth muscle contractile phenotype by nonmuscle myosin.

Abstract excerpt

The contractile phenotype of a smooth muscle can broadly be classified as phasic or tonic. Following activation, phasic smooth muscle exhibits an initial period of rapid force activation, following which force falls to a lower steady state level. In contrast, force generated by tonic smooth muscle rises slowly to a sustained steady state. The differences in contractile patterns cannot be explained by the time...

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