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单词 Spindle fibre
释义

Spindle fibre

原声例句
生物学基础入门

The chromosomes become attached to Spindle Fibres which run from one pole to another.

染色体附着在纺锤丝上,从端到另一端。

中文百科

微管 Microtubule

(重定向自Spindle fibre)
图中微管的环状横截面展示了由13条原纤维构成的中空管状结构。
使用β-微管蛋白抗体描绘微管的免疫荧光技术

微管(英语:Microtubule)是细胞骨架的一个组成部分,可以在整个细胞质中找到。微管蛋白的这些管状聚合物可以增长长达50微米,具有25微米的平均长度,并且是高度动态的。微管的外径约为24纳米,而内直径为约12纳米。它们在真核生物细胞中被发现,以及它们被两个球状蛋白,α和β微管蛋白的二聚体聚合而形成。

微管是在许多细胞过程中的非常重要的。它们是参与维持细胞的结构,并与微丝和中间纤维它们形成细胞骨架。它们也组成纤毛和鞭毛的内部结构。它们提供了用于胞内运输平台和参与了多种细胞过程,包括分泌囊泡,细胞器和细胞内的物质(参见,动力蛋白和驱动蛋白的条目)的运动。它们还参与细胞分裂(有丝分裂和减数分裂),包括形成纺锤体,其用于拉开真核染色体。

英语百科

Microtubule 微管

(重定向自Spindle fibre)
Structure of a microtubule. The ring shape depicts a microtubule in cross-section, showing the 13 protofilaments surrounding a hollow center.
Just as our bodies rely on bones for structural support, our cells rely on a cellular skeleton. In addition to helping cells keep their shape, this cytoskeleton transports material within cells and coordinates cell division. Microtubules are shown here as thin strands
Cartoon representation of the structure of α(yellow)/β(red)-tubulin heterodimer, GTP and GDP.[6]
Components of the eukaryotic cytoskeleton. Actin filaments are shown in red, microtubules are in green, and the nuclei are in blue. The cystoskeleton provides the cell with an inner framework and enables it to move and change shape.

Microtubules (micro- + tube + -ule) are a component of the cytoskeleton, found throughout the cytoplasm. These tubular polymers of tubulin can grow as long as 50 micrometres and are highly dynamic. The outer diameter of a microtubule is about 24 nm while the inner diameter is about 12 nm. They are found in eukaryotic cells, as well as some bacteria, and are formed by the polymerization of a dimer of two globular proteins, alpha and beta tubulin.

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