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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3937
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dc.contributor.authorKikuchi, Norio-
dc.contributor.authorEhrlicher, Allen-
dc.contributor.authorKoch, Daniel-
dc.contributor.authorKas, Josef A.-
dc.contributor.authorRamaswamy, Sriram-
dc.contributor.authorRao, Madan-
dc.date.accessioned2010-07-22T08:51:23Z-
dc.date.available2010-07-22T08:51:23Z-
dc.date.issued2009-11-24-
dc.identifier.citationProceedings of the National Academy of Sciences, 2009, Vol.106, p19776en
dc.identifier.issn0027-8424-
dc.identifier.issn1091-6490 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/3937-
dc.descriptionRestricted Access.en
dc.description.abstractWe present a generic theory for the dynamics of a stiff filament under tension, in an active medium with orientational correlations, such as a microtubule in contractile actin. In sharp contrast to the case of a passive medium, we find the filament can stiffen, and possibly oscillate or buckle, depending on both the contractile or tensile nature of the activity and the filament-medium anchoring interaction. We also demonstrate a strong violation of the fluctuation–dissipation (FD) relation in the effective dynamics of the filament, including a negative FD ratio. Our approach is also of relevance to the dynamics of axons, and our model equations bear a remarkable formal similarity to those in recent work [Martin P, Hudspeth AJ, Juelicher F (2001) Proc Natl Acad Sci USA 98:14380–14385] on auditory hair cells. Detailed tests of our predictions can be made by using a single filament in actomyosin extracts or bacterial suspensions.en
dc.language.isoenen
dc.publisherNational Academy of Sciencesen
dc.relation.urihttp://dx.doi.org/10.1073/pnas.0900451106en
dc.rights2009 National Academy of Sciencesen
dc.subjectcytoskeletonen
dc.subjectactive hydrodynamicsen
dc.subjectmicrorheologyen
dc.subjectfluctuation-dissipation ratioen
dc.subjectneuronal growth coneen
dc.titleBuckling, stiffening, and negative dissipation in the dynamics of a biopolymer in an active mediumen
dc.typeArticleen
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