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Choose from 2 pictures in our Tropomyosin collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.
Muscle contraction, artwork
Muscle contraction. Artwork showing the mechanism for muscle contraction in skeletal and cardiac muscle. At top right troponin (T, C, I) is bound to tropomyosin (red), preventing the myosin head (gold) from forming a crossbridge with the actin filament (green). The propagation of an action potential releases calcium ions (purple) into the muscle cell (bottom right). The calcium ion binds to troponin, changing its shape and exposing the myosin binding site on the actin filament. The binding of actin and mysoin causes the muscle to contract (bottom left). The myosin then binds ATP, which allows it to release the actin and return to the starting position (top left)
© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY