Bend propagation by a sliding filament model for flagella.
Bend propagation by a sliding filament model for flagella.
复制标题
鞭毛滑动丝模型的弯曲传播。
DOI：
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发表时间：
1971
影响因子：
2.8
通讯作者：
C. Brokaw
中科院分区：
文献类型：
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作者：
C. Brokaw
1.如果鞭毛之间发生主动滑动，就像肌肉收缩的滑动细丝机制所建议的那样，它将产生沿着鞭毛一个方向的正弯曲和相反方向的负弯曲。因此，如果通过折弯激活了滑动过程，则折弯将自动传播。
2.与弯曲波均匀传播所产生的粘性弯矩相匹配所需的主动弯矩可以通过任意点的鞭毛曲率与该点的主动滑动过程产生的单位长度力矩的大小之间的简单关系来产生。
3.这一繁殖机制结合了先前提出的两种鞭毛弯曲繁殖机制的特点。当这些传播机制是根据鞭毛弯曲的“局部弯曲”模型发展时，当使用“滑动细丝”模型时，避免了出现的主要困难。
4.鞭毛的弹性常数对弯曲传播的影响很小，在没有附加假设的情况下，无法从鞭毛弯曲波传播参数的测量中获得它们的大小。
1. If active sliding occurs between flagellar filaments, as suggested for the sliding filament mechanism for muscular contraction, it will generate positive bending in one direction along the flagellum and negative bending in the opposite direction. Bends will therefore be propagated automatically if the sliding process is activated by bending.
2. The active bending moment required to match the viscous bending moments resulting from the uniform propagation of bending waves can be generated by a simple relationship between the curvature of the flagellum at any point and the magnitude of the moment per unit length generated by the active sliding process at that point.
3. This propagation mechanism incorporates features of the two mechanisms proposed previously for flagellar-bend propagation. The major difficulties which arise when these propagation mechanisms are developed in terms of a ‘local-bending’ model for flagellar bending are avoided when a ‘sliding filament’ model is used.
4. The elastic constants of the flagellum have a minor role in bend propagation, and without additional assumptions their magnitudes cannot be obtained from measurements of the parameters of flagellar bending-wave propagation.