Myosin Heavy Chains and Muscle Fiber Type
Written by Invictus member Dr. Irene Tobias
In Part 1 of this post, we learned how myosin drives the molecular processes of muscle contraction. Now to expand on that knowledge to understand the differences between fast and slow twitch muscle fibers at the molecular level!
What are myosin heavy chains?
The myosin protein complex which forms the molecular motor that drives muscle contraction is composed of four component proteins: two heavy chains and two light chains, twisted around each other.