鞭毛精细结构的新观察。基体结构与轴丝微管成分之间的关系。
New observations on flagellar fine structure. The relationship between matrix structure and the microtubule component of the axoneme.
作者信息
Warner F D
出版信息
J Cell Biol. 1970 Oct;47(1):159-82. doi: 10.1083/jcb.47.1.159.
Abstract
The sperm flagella of the blowfly Sarcophaga bullata demonstrate the relationship of radial projections in the matrix region to the microtubule organization of the axoneme. The A microtubule of each peripheral doublet is connected to the central sheath by a series of paired radial links. The links lie along the tubule wall with a alternate spacing of about 320/560 A. The distal end of each link is enlarged into a globular head that connects via a transitional link to the helical sheath around the central microtubules. The radial link pairs are disposed in the form of a double helix with a pitch of about 1760 A. It is proposed that a similar organization is common to all cilia and flagella showing ninefold symmetry and must provide, in part, the morphological basis for motility.
摘要
麻蝇的精子鞭毛显示了基质区域的径向突起与轴丝微管组织之间的关系。每个外周双联体的A微管通过一系列成对的径向连接与中央鞘相连。这些连接沿着管壁排列，交替间距约为320/560埃。每个连接的远端扩大成一个球状头部，通过一个过渡连接与围绕中央微管的螺旋鞘相连。径向连接对呈双螺旋形式排列，螺距约为1760埃。有人提出，类似的组织结构对于所有呈现九重对称性的纤毛和鞭毛来说是共同的，并且必须部分地为运动提供形态学基础。
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