Nag A C
J Cell Biol. 1972 Oct;55(1):42-57. doi: 10.1083/jcb.55.1.42.
Electron microscopy, together with quantitation using a tracing device linked to a digital computer, reveals that the red and white muscle fibers of Salmo gairdneri differ in diameter, organization of myofibrils, dimensions of myofilaments, volumes and surface areas of T system and sarcoplasmic reticulum, morphology of mitochondria, and content of mitochondria, lipid, and glycogen. Biochemical studies show that the ATPase activity of white fibers is three times that of the red fibers. Actomyosin content of red fibers is higher than that of the white fibers. The functional significance of these differences between two fiber types is discussed.
电子显微镜检查,结合使用与数字计算机相连的追踪装置进行定量分析,结果显示,虹鳟的红肌纤维和白肌纤维在直径、肌原纤维的组织、肌丝的尺寸、T 系统和肌浆网的体积及表面积、线粒体的形态以及线粒体、脂质和糖原的含量等方面存在差异。生化研究表明,白肌纤维的 ATP 酶活性是红肌纤维的三倍。红肌纤维的肌动球蛋白含量高于白肌纤维。文中讨论了这两种纤维类型之间这些差异的功能意义。