منابع مشابه
The contractile ring
of tools, including physiological recording, imaging, computation, behaviour, and, more recently, molecular biology. We rewire brains to understand how inputs shape cortical development; we study molecules that intervene between electrical activity and the development of connections; and we study the effect of learning and internal state on networks of the adult visual cortex. More generally, w...
متن کاملThe contractile ring
What is the contractile ring? During cell division, the contractile ring generates the constricting force to separate one cell into two cells. Formed during cytokinesis, the last step of cell division, the contractile ring is composed of filamentous actin (F-actin) and the motor protein myosin-2, along with additional structural and regulatory proteins. The contractile ring forms under the surf...
متن کاملMolecular model of the contractile ring.
We present a model for the actin contractile ring of adherent animal cells. The model suggests that the actin concentration within the ring and consequently the power that the ring exerts both increase during contraction. We demonstrate the crucial role of actin polymerization and depolymerization throughout cytokinesis, and the dominance of viscous dissipation in the dynamics. The physical ori...
متن کاملA Molecular Model of the Contractile Ring
We present a model for the actin contractile ring of adherent animal cells. The model suggests that the actin concentration within the ring, and consequently the power that the ring exerts both increase during contraction. We demonstrate the crucial role of actin polymerization and depolymerization throughout cytokinesis, and the dominance of viscous dissipation in the dynamics. The physical or...
متن کاملMyosin II dynamics and cortical flow during contractile ring formation in Dictyostelium cells
Myosin II is a major component of a contractile ring. To examine if myosin II turns over in contractile rings, fluorescence of GFP-myosin II expressed in Dictyostelium cells was bleached locally by laser illumination, and the recovery was monitored. The fluorescence recovered with a half time of 7.01 +/- 2.62 s. This recovery was not caused by lateral movement of myosin II from the nonbleached ...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2006
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.1743iti5