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Tropomyosin and troponin and their role in regulating muscle contraction http://www.khanacademy.org/video/tropomyosin-and-troponin-and-their-role-in-regulating-muscle-contraction ------------------------------------------------- يتحدث هذا الفيديو عن دور بروتين التربوميوسين والتربونين في انقباض العضلات ------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org