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. 2010 Oct 22;300(1):L121–L131. doi: 10.1152/ajplung.00228.2010

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Fig. 2. — Model schematic. Myosin heads could be in 4 different states: dephosphorylated and detached (M), phosphorylated and detached (Mp), phosphorylated and attached (AMp), or dephosphorylated and attached (AM). The rate constants for phosphorylation (k₁) and dephosphorylation (k₂) were the same for attached and detached myosin heads. The rate constants for attachment (f_p) and detachment (g_p) of phosphorylated myosin, and detachment of dephosphorylated myosin (g) were functions of myosin strain (x).