Muscle. Support for the lever arm.
Huxley
A F
AF
D000199:Actins / Q000502:physiology*; D000818:Animals; D008954:Models, Biological; D020409:Molecular Motor Proteins; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D009154:Mutation; D009218:Myosins / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D011487:Protein Conformation
D000199:Actins; D020409:Molecular Motor Proteins; D009218:Myosins