蜥蜴心肌细胞连接肌浆网中的球状小体。
Spheroidal bodies in the junctional sarcoplasmic reticulum of lizard myocardial cells.
作者信息
Forbes M S, Sperelakis N
出版信息
J Cell Biol. 1974 Mar;60(3):602-15. doi: 10.1083/jcb.60.3.602.
The sarcoplasmic reticulum (SR) of lizard (Anolis carolinensis) myocardial cells has been examined, with particular attention being paid to the structural details of the peripheral couplings (junctional SR). Spheroidal bodies are present within the opaque core of junctional SR; these can be seen both in sections made en face and in sections cut to show the apposition of the junctional SR with the sarcolemma. Opaque junctional processes extend between the sarcolemma and the peripheral junctional SR. The myocardial cells in addition contain some SR cisternae deep within the cells which also possess opaque cores composed of spheroids. Although the significance of the junctional SR spheroidal bodies is unknown, it is thought that they could act as a matrix on which enzymes such as calcium-specific ATPase may be located.
对蜥蜴（绿安乐蜥）心肌细胞的肌浆网（SR）进行了检查，特别关注了周边连接（连接肌浆网）的结构细节。在连接肌浆网的不透明核心内存在球状小体；在正面切片以及为显示连接肌浆网与肌膜并置而切割的切片中均可见到这些球状小体。不透明的连接突起在肌膜和周边连接肌浆网之间延伸。心肌细胞内部还含有一些位于细胞深处的肌浆网池，这些肌浆网池也具有由球体组成的不透明核心。尽管连接肌浆网球状小体的意义尚不清楚，但人们认为它们可能作为一种基质，钙特异性ATP酶等酶可能位于其上。
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