Schmekel K, Wahrman J, Skoglund U, Daneholt B
Department of Cell and Molecular Biology (CMB), Medical Nobel Institute, Karolinska Institutet, Stockholm, Sweden.
Chromosoma. 1993 Dec;102(10):669-81. doi: 10.1007/BF00650893.
The synaptonemal complex (SC) in the beetle Blaps cribrosa contains a highly organized central element (CE), two flanking lateral elements (LEs), and a number of regularly spaced transverse filaments (TFs) crossing the central region. The CE is built like a ladder with two longitudinal components running in parallel and a number of regularly spaced transverse CE components, bridging the two longitudinal components. The CE is multi-layered with the ladders of the individual layers more or less in register. Essentially every TF originates in one of the LEs, crosses the CE through a transverse CE component and reaches the opposite LE; every transverse CE component in a given layer corresponds to one, and only one, TF. In a CE layer, short irregular pillars form the junctions between the transverse and longitudinal CE components. Adjacent pillars are connected to each other by fine fibrous bridges: the two pillars in the same transverse CE component are linked, and so are the pillars along each longitudinal component, and also more occasionally adjacent pillars in separate CE layers. It is proposed that a TF with the two associated short pillars represents the structural unit in the central region. The ordered structure of the CE is accomplished by linking adjacent pillars to each other into the well-defined three-dimensional organization of the CE.
拟步甲（Blaps cribrosa）中的联会复合体（SC）包含高度有序的中央元件（CE）、两个侧翼侧元件（LE）以及一些穿过中央区域的规则间隔的横向细丝（TF）。中央元件构建得像一个梯子，有两个平行排列的纵向组件以及一些规则间隔的横向中央元件组件，这些横向组件连接着两个纵向组件。中央元件是多层的，各层的梯子或多或少对齐。基本上每个横向细丝都起源于一个侧元件，穿过中央元件的一个横向中央元件组件并到达相对的侧元件；给定层中的每个横向中央元件组件对应一个且仅一个横向细丝。在中央元件层中，短的不规则柱状物形成横向和纵向中央元件组件之间的连接点。相邻的柱状物通过细纤维桥相互连接：同一横向中央元件组件中的两个柱状物相连，沿每个纵向组件的柱状物也相连，并且在不同中央元件层中偶尔相邻的柱状物也相连。有人提出，带有两个相关短柱状物的横向细丝代表中央区域的结构单元。中央元件的有序结构是通过将相邻的柱状物相互连接成中央元件明确的三维组织来实现的。
