骨骼肌纤维Z线的超微结构。
Ultrastructure of the Z line of skeletal muscle fibers.
作者信息
Rowe R W
出版信息
J Cell Biol. 1971 Dec;51(3):674-85. doi: 10.1083/jcb.51.3.674.
Abstract
A new model of Z-line structure in skeletal muscle is proposed. Unlike previous models it is capable of explaining the two apparently inconsistent lattice arrangements seen in thin sections, i.e., the "basket weave" lattice and the smaller lattice recently reported in the literature. The model is based on four looping helical strands derived from the I filaments within the Z line. Each of these four strands form hairpin-shaped loops within the Z line and then join with an adjacent I filament in the same sarcomere. The two apparently different lattices represent a common structure viewed at slightly different levels of section.
摘要
提出了一种骨骼肌Z线结构的新模型。与之前的模型不同，它能够解释在薄切片中看到的两种明显不一致的晶格排列，即“篮状编织”晶格和文献中最近报道的较小晶格。该模型基于源自Z线内I细丝的四条环状螺旋链。这四条链中的每一条在Z线内形成发夹状环，然后与同一肌节中的相邻I细丝相连。这两种明显不同的晶格代表了在略有不同的切片水平上观察到的共同结构。
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