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February 2nd 2012.docx

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Department
Biology
Course
BIO1140
Professor
A L L
Semester
Winter

Description
ndFebruary 2 2012Function of microtubules continuedCell division two different sets of microtububles if the microtubules bump in the kinecticore chromosomes then it becomes a kineticore microtubule and the ones that do not are polar microtubules extend across the cellKinecticore are important in separating the chromosomes The kinecticore moves the chromosomes awat from the centre and towards the polar ends It has a motor protein that dissociates the microtubule behind it leaving tubulindimmers Polar microtubules push apart the poles of the cell to help it separate into two cells also involves motor proteins Microfilaments smallest cytoskeletal element in terms of diameter 7nm Comprised of actin Gactin actin has a U shape and in the middle there is a binding site that binds ATP or ADP An individual actin is a globular protein Gactin they string together to make a filament Factin The individual actin always lines up with u pointing up The minus end is where dissociation occurs and the
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