Mechanical property of the helical configuration for a twisted intrinsically straight biopolymer
學年 107
學期 2
出版（發表）日期 2019-05-01
作品名稱 Mechanical property of the helical configuration for a twisted intrinsically straight biopolymer
作品名稱（其他語言）
著者 Zicong Zhou and Chen-Xu Wu
單位
出版者
著錄名稱、卷期、頁數 European Biophysics Journal 48(4), p.329–340
摘要 We explore the effects of two typical torques on the mechanical property of the helical configuration for an intrinsically straight filament or biopolymer either in three-dimensional space or on a cylinder. One torque is parallel to the direction of a uniaxial applied force, and is coupled to the cross section of the filament. We obtain some algebraic equations for the helical configuration and find that the boundary conditions are crucial. In three-dimensional space, we show that the extension is always a monotonic function of the applied force. On the other hand, for a filament confined on a cylinder, the twisting rigidity and torque coupled to the cross section are irrelevant in forming a helix if the filament is isotropic and under free boundary condition. However, the twisting rigidity and the torque coupled to the cross section become crucial when the Euler angle at two ends of the filament are fixed. Particularly, the extension of a helix can subject to a first-order transition so that in such a condition a biopolymer can act as a switch or sensor in some biological processes. We also present several phase diagrams to provide the conditions to form a helix.
關鍵字 Mechanical property;Twisted biopolymer;Helix;Phase transition
語言 en
ISSN 1432-1017
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 否
國別 CHE
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117121 )