BIO SCI E109 Chapter Notes - Chapter 11: Nebulin, Sarcomere, Conformational Change
8 Oct 2016
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11. 2 organization of skeletal muscle: there are three types of muscle proteins. Motor protein, consists of 6 polypeptide chans: 2 large heavy chains+4 small light chans thin filaments thick filament. The myosin heads project outward from the shaft in a spiraling fashion, each extending toward one of the 5. On each g actin is a myosin-binding site, myosin head attach. F actin: a fibrous structure which g actin are linked together to form. A single thin filament=2 f chains arranged in a double helix+ troponin + tropomyosin molecules. Regulatory protein help switch the contraction process on and off. Tropomyosin: a rod-shaped pro join with other tropomyosin to form 2 long strands that wrap around the f actin double helix. In a relaxed muscle, myosin is blocked from binding to actin because the strands of tropomyosin cover the myosin-binding side on actin.
