Jahromi S S, Charlton M P
J Cell Biol. 1979 Mar;80(3):736-42. doi: 10.1083/jcb.80.3.736.
Transversely split sarcomeres are seen in mouthpart muscles of the blue crab in the electron microscope. Sarcomeres split only at the H zone. Two new sarcomeres are formed by a Z disk which appears in the H zone of the splitting sarcomere. Splitting may involve breaking of the thick filaments in the H zone, elongation of these filaments, and formation of both new actin filaments and Z-disk materials, Sarcomere splitting would allow longitudinal growth of muscle cells without lengthening of sarcomeres and concomitant changes in contractile properties.
在电子显微镜下，横纹肌节的横向分裂出现在蓝蟹口器肌肉中。肌节仅在H区分裂。由出现在正在分裂的肌节H区的一个Z盘形成两个新的肌节。分裂可能涉及H区粗肌丝的断裂、这些肌丝的伸长以及新肌动蛋白丝和Z盘物质的形成。肌节分裂将允许肌肉细胞纵向生长，而不延长肌节，也不伴随收缩特性的变化。
