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L1793P mutant myosin forms shorter filaments relative to wild-type. (A) TEM micrographs of synthesized wild-type myosin filaments show linear structures of relatively uniform size and shape. L1793P mutant myosin assembles into morphologically similar filaments. Scale bar = 500 nm. (B) Randomized contour measures of myosin filament lengths show that L1793P mutant myosin, on average, formed significantly shorter filaments than wild-type myosin (P < 0.0001). Error bars indicate SD.
