Btropomyosin (1 filamentous protein of ; two polypeptide chains C,troponin: three sub units Tn t: bind to 肌动蛋自单体 原肌球蛋白 肌原蛋白 tropomyosin OO 」nT 肌丝 Tn C: binds to & easter calcium ions (3 肌球蛋白杆 Tn inhibite actin- 粗肌丝 肌球蛋白头 myosin interaction (横桥)B.tropomyosin: filamentous protein of two polypeptide chains C. troponin: three sub￾units: -Tn T: bind to tropomyosin -Tn C: binds to calcium ions -Tn I: inhibite actin￾myosin interaction