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本帖最后由 细胞海洋 于 2012-12-17 10:47 编辑 8 \$ R, ?# I) l$ E8 e
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6 c K+ U' i0 }1 YAt the end of cell division in animal cells, the mother cell splits into two daughter cells and partitions segregated chromosomes in a process called cytokinesis. The mitotic spindle controls cytokinetic events at the plasma membrane, but the mechanisms connecting these two macrostructures have been unclear. Mark Petronczki and colleagues now present a structural and functional analysis that identifies centralspindlin, a protein complex in the spindle midzone and midbody, as a missing link between the mitotic spindle and the plasma membrane — a link that secures the final cut during cytokinesis. The authors identify a domain in the MgcRacGAP subunit of centralspindlin as a tether that binds to phosphoinositide lipids in the plasma membrane. On the cover, a fluorescent light micrograph of a cell in the metaphase stage of mitosis. (Torsten Wittmann/Science Photo Library)7 v3 J+ y. a3 d) f& q
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发表于 2012-12-15 14:11
发表于 2012-12-15 18:58
