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Do Sarcomeres produce actin and myosin?
yes
What are the proteins are involved in muscle contraction?
Actin and myosin
What protein makes up the thick filaments of myofibrils?
Myosin makes up the THICK filaments, and actin makes up the thin filaments of myofibrils.
What are the thick protein filaments in the cell made of?
The thick filament is composed of the myosin molecule. The thin filament is composed of the actin molecule. Flexing the head of myosin provides the powerstroke.
Where do myosin cross bridges attach during muscle contraction?
Myosin functions as an ATPase utilizing ATP to produce a molecular conformational change of part of the myosin and produces movement. Movement of the filaments over each other happens when the globular heads protruding from myosin filaments attach and interact with actin filaments to form crossbridges. The myosin heads tilt and drag along the actin filament a small distance (10-12 nm). The heads then release the actin filament and adopt their original conformation.
Do muscles produce proteins?
Yes muscle and all other cells produce proteins. Muscles produced the important structural protein myosin. They are essential molecules that carry out muscle contraction.
What is the function of myosin?
Myosin is responsible for actin-based muscular mobility/contraction.
Myosin light-chain kinase?
is antagonized by the actions of myosin phosphatase
Binding of the myosin heads sequentially prevents what?
myosin crossbridge binding
The thick filaments of muscle fibers are composed of what?
Myosin
Which proteins found myofilaments contains the cross bridge?
The two muscle filaments are Myosin and Actin. Myosin is the thicker of the two. When a muscle contracts, a hook like particle extends off the myosin and grabs the actin pulling it in causing the contraction/ tension of the muscle
What does the release of ADP and P from the myosin head cause?
The release of ADP and P from the myosin heads causes the myosin heads to change shape.
