Muscle: the sliding filament at 50.
Clarke
Maxine
M
D000199:Actins / Q000378:metabolism; D049673:History, 20th Century; D020407:Internet; D009119:Muscle Contraction / Q000502:physiology*; D018482:Muscle, Skeletal / Q000737:chemistry / Q000502:physiology*; D009210:Myofibrils / Q000737:chemistry / Q000502:physiology*; D009218:Myosins / Q000378:metabolism
D000199:Actins; D009218:Myosins