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2B - Positioning of nucleus via MTs Myosin generates...

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Skeletal muscle is structured by stabilizing and scaffolding proteins
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The sarcoplasmic reticulum regulates the level of free Ca2+
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Ca 2+ Release triggers muscle contraction cycle, about 30 msec
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Ca2+ binding to troponin/tropomyosin shifts their position along the actin filament exposing myosin binding sites
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Actin and myosin in non-muscle cells Localization of myosin I and myosin II during cytokinesis
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Myosin-V-bound vesicles are carried along by actin filaments Note: Actin is capped by formin. Transport of many types of vesicles. Transport of mRNA.
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Unformatted text preview: Positioning of nucleus via MTs. Myosin generates cytoplasmic streaming In alga Nitella actin rings works with myosin to move vesicles etc. Cell Migration Stress fibers associated with cell adhesion are long actin fibers which are interacting with myosin and other regulatory molecules. These fibers are contractile. Chemotaxis What Provides Directional Cues? What does a cell need on its surface to respond? What is the cell moving along? 4 steps of cell movement Rac, Rho, cdc42, actin and cell migration...
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