Chapter 16

Chapter 16 - Chapter 16 Cell movement Kinesin and Dynein...

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Chapter 16 Cell movement Kinesin and Dynein moves the vesicles on microtubules, one end of kinesin or dynein is attatched to vesicle and two “feet” are on the MTs. They are motor proteins, that hydrolysis ATP and cause a conformational change that makes them “rotate” Kinesin moves towards the + end of MT Dynein moves towards the – end of MT. In structure of dynein, heavy chains bind to MTs and Vesicles on the other end are attached by spectrin and ankyrin. FIG 16-5 Movement of structures within the cell Vesicles in antrograde movement move from ER to cis golgi go MTOC by Dynein protein because they are moving towards – end From golgi to Plasma membrane Kinesin is involved because they are moving from – end to + end. Retrograde movement From PM to MTOC and glogi complex is by dynein From MTOC to ER is by kinesin Vesicles going towards MTOC and Golgi complex are always dynein, either antro or retro grade. Vesicles going towards PM or ER from MTOC and Golgi complex are always kinesin. FIG 16-6 Function of cilia is to beat mucus and bring it to upper respiratory, upper respiratory moves mucus down and lower respiratory moves mucus up, so we can swallow it and our stomach can
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Chapter 16 - Chapter 16 Cell movement Kinesin and Dynein...

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