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Figure 1. Two mechanisms for contraction: buckling and end clustering.Top: When two anti-parallel actin filaments are bridged by a myosin motor (blue) and a crosslink (green), their relative movement forces one filament to buckle, resulting in the contraction of the network. Bottom: Microtubule contraction seems to depend on the affinity of dynein motors (red) for the ends of the filaments. For a recent review on the topic of contraction, see Clark et al., 2014.
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Active contraction of microtubule networks.
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Xenbase Hentrich,
Microtubule organization by the antagonistic mitotic motors kinesin-5 and kinesin-14.
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Contractile units in disordered actomyosin bundles arise from F-actin buckling.
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Xenbase
