KINE 2011 Lecture Notes - Lecture 25: Myelin, Peptide, Motor Neuron
22 Oct 2017
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Tropomyosin and troponin are important regulatory molecules for the contraction = bind to the thin actin filaments. Around the actin here you see the white troponin and then this light brown filament rolling over the actin molecule is called the tropomyosin. Cross-bridge part of the myosin molecule that can reach the filament of actin. This specific art of the myosin that can catch the filament of actin is what we call the cross-bridge. The filament of myosin has a myosin head that is capable of interacting with the filament of actin. This cross bridge is important for muscle contraction, so this myosin head will be able to get this actin filament and make your sarcomere to shorten. The sliding movement => thin filaments move toward the center of the sarcomere. => myosin"s cross-bridges bind to actin; the cross bridges then flex to slide actin. The cross bridge can attach to the actin filament.
