Characterization of a non-indexible equatorial x-ray reflection from frog sartorius muscle.
Characterization of a non-indexible equatorial x-ray reflection from frog sartorius muscle.
复制标题
青蛙缝匠肌不可转位赤道 X 射线反射的表征。
DOI：
10.1016/0022-2836(77)90165-6
复制
发表时间：
1977
影响因子：
5.6
通讯作者：
R. J. Podolsky
中科院分区：
文献类型：
--
作者：
L. Yu;R W Lymn;R. J. Podolsky
使用位置敏感探测器研究了青蛙缝匠肌的 X 射线赤道反射。在 10 和 11 峰之间出现弱反射，该反射没有在六角丝晶格上进行索引。这一反思首先由 Elliottet 等人报道。 （1967）进一步表征。反射的间距与肌节长度在 2·0 μm 和 3·0 μm 之间的 10 个峰的间距成正比。它的强度似乎对长度变化相对不敏感。肌肉斜切面电子显微照片的光学衍射图案给出了肌球蛋白丝和 Z 盘晶格的间距比率，该比率与 X 射线结果密切相关。这表明 Z 盘结构是这种不可转位反射的主要来源。
X-ray equatorial reflections from frog sartorius muscle were studied using a position sensitive detector. A weak reflection appeared between the 10 and 11 peaks which did not index on the hexagonal filament lattice. This reflection, first reported by Elliottet al. (1967), was further characterized. The spacing of the reflection varied in direct proportion to that of the 10 peaks for sarcomere lengths between 2·0 μm and 3·0 μm. Its intensity appeared relatively insensitive to length changes. Optical diffraction patterns from electron micrographs of oblique sections through muscle gave ratios for the spacings of the myosin filaments and theZ-disc lattice that correlated very closely with the X-ray results. It is suggested that theZ-disc structure is the major source of this nonindexible reflection.