简单Z线的结构。
The structure of a simple Z line.
作者信息
Franzini-Armstrong C
出版信息
J Cell Biol. 1973 Sep;58(3):630-42. doi: 10.1083/jcb.58.3.630.
Abstract
The structural simplicity of the Z line in fish muscle fibers allows direct visualization of its basic geometry. Models which postulate termination of the I filaments at the edges of the Z line and the direct linkage of I filaments belonging to the two adjacent sarcomeres by Z filaments crossing the whole width of the Z line give the best fit to the electron micrographs. The structure of fish Z lines is not significantly altered by the use of different fixation procedures and by changes in sarcomere length.
摘要
鱼类肌肉纤维中Z线的结构简单，这使得可以直接观察到其基本几何形状。那些假定I细丝在Z线边缘终止，并且通过横跨Z线整个宽度的Z细丝将属于两个相邻肌节的I细丝直接连接起来的模型，与电子显微镜图像最为吻合。使用不同的固定程序以及肌节长度的变化，并不会显著改变鱼类Z线的结构。
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