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Schematic drawings of wild-type myosin II and green fluorescent protein (GFP)-RLC-myosin rod. Wild-type myosin II is a hexameric molecule composed of two heavy chains, two ELCs, and two RLCs. Each heavy chain consists of a catalytic domain, which binds and moves actin filaments, an ELC-binding site, an RLC-binding site, and a rod. In the chimeric protein GFP-RLC-myosin rod, GFP is fused to a truncated myosin II heavy chain that is missing the catalytic domain and the ELC-binding site.
