Pg. 1092-1094.docx

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10 Apr 2012
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Pg. 1092-1094
Cytokinesis
Cytokinesis: final step of cell division
Occurs between anaphase and ends at telophase
The change is visible through cleavage furrow; which spreads until the cell
divides into two
The structure of the cell furrow is created by a contractile ring; dynamic
assembly of actin filaments, myosin II
Cytokinesis occurs in four steps: initiation, contraction, membrane insertions
and completions
Actin and Myosin II in the Contractile Ring Generate the Force for Cytokinesis
Actin and myosin II begin to accumulate into contractile ring
The contractile ring depends on formin protein
Midbody: a tether between two daughter cells