BISC 320 Lecture Notes - Lecture 16: Anaerobic Glycolysis, University Of Manchester, Arginine
9 Oct 2017
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Document Summary
The major bands are the a bands and i bands. These give skeletal muscle its striated appearance: in the middle of the i band are z discs, also called z lines. The heavy chain tails wrap around each other. The head of the heavy chains have actin and atp binding sites. The atp binding site has enzymatic function in that it hydrolyzes atp to adp and phosphate. The light chains wrap around the heads and change the conformation of the heads. The h zone of the a band has only thick filaments. Yes: sliding- called cross bridge contraction, in rigor, a transient state, actin is bound to myosin at the respective sites and the myosin. Rigor is a transient state when atp is available. Myosin binding release the phosphate and causes a power stroke as the head of the myosin moves toward the tail, moving the actin filament about. 10 nm towards the center of the sarcomere.
