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Schematic representation of a sarcomere. The thick and thin filaments overlap in the region of the A-band, with the I-band formed from the thin filaments only. The central M-line anchors the thick filaments and the Z-disk the thin filaments. Titin is found along the length of the sarcomere. Tropomyosin and the troponin complex interact with actin to form part of the thin filament
