ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY ANATOMICAL TRAVELOGUE / SCIENCE PHOTO LIBRARY
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Visualisation of the interaction between myosin and actin molecules. The thin filament (top) is composed of actin (yellow), tropomyosin (white strip) and troponin (white oval). The thick filament (pink) is composed of several chains of twisted myosin with globular protruding heads. The interaction between myosin and actin is critical to muscle contraction.
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