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  • Title: Evidence that unphosphorylated smooth muscle myosin supports smooth muscle contraction.
    Author: Grazi E, Trombetta G.
    Journal: Biochem Biophys Res Commun; 1991 Aug 15; 178(3):967-73. PubMed ID: 1831357.
    Abstract:
    Unphosphorylated smooth muscle myosin filaments do not disassemble in MgATP, provided that the solution is supplemented either by 25% serum albumin or by 6% polyethylene glycol 6000. These filaments are able to support actomyosin retraction but their ATPase activity is not activated by tropomyosin-decorated F-actin.
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