Structural evidence that myosin heads may interact with two sites on F-actin.
D000199:Actins / Q000378:metabolism*; D001665:Binding Sites; D002118:Calcium / Q000502:physiology; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009218:Myosins / Q000378:metabolism*; D014335:Tropomyosin / Q000378:metabolism; D014961:X-Ray Diffraction
D000199:Actins; D014335:Tropomyosin; D009218:Myosins; D002118:Calcium