Akster H A
Cell Tissue Res. 1985;241(1):193-201. doi: 10.1007/BF00214641.
Ultrastructural parameters of muscle fibre types of the carp (Cyprinus carpio L.) were measured and compared with their contractile properties. In red fibres, which are slower than pink fibres, the relative length of the junction between the T system and the sarcoplasmic reticulum (T-SR junction) is smaller and the Z lines are thicker than in pink fibres. Pink fibres have a smaller relative length of T-SR junction than white fibres from the axial muscles. The two types of red fibres present in carp muscle also differ in their relative lengths of T-SR junction. Significant differences in the relative areas of the SR were not found. The relative volume of myofibrils in red fibres is two-thirds that in pink fibres, a difference that is not reflected in the maximal isometric tetanic tensions of these types. Red fibres, which are less easily fatigued than pink fibres, have larger relative volumes of subsarcolemmal and intermyofibrillar mitochondria. Small pink fibres have a larger relative volume of subsarcolemmal mitochondria than large pink fibres, but have a similar relative volume of intermyofibrillar mitochondria. Small and large pink fibres differ in the relative volumes of their membrane systems, but have similar relative lengths of T-SR junction.
对鲤鱼（Cyprinus carpio L.）肌纤维类型的超微结构参数进行了测量，并与其收缩特性进行了比较。在比粉色纤维收缩速度慢的红色纤维中，T系统与肌浆网之间连接处（T-SR连接处）的相对长度较小，且Z线比粉色纤维中的更厚。粉色纤维的T-SR连接处相对长度比来自轴肌的白色纤维小。鲤鱼肌肉中存在的两种类型的红色纤维在T-SR连接处的相对长度上也有所不同。未发现肌浆网相对面积的显著差异。红色纤维中肌原纤维的相对体积是粉色纤维的三分之二，这种差异并未体现在这些类型纤维的最大等长强直张力上。比粉色纤维更不易疲劳的红色纤维，其肌膜下和肌原纤维间线粒体的相对体积更大。小的粉色纤维比大的粉色纤维具有更大的肌膜下线粒体相对体积，但肌原纤维间线粒体的相对体积相似。小的和大的粉色纤维在其膜系统的相对体积上有所不同，但T-SR连接处的相对长度相似。
