STUDIES OF THE TRIAD : I. Structure of the Junction in Frog Twitch Fibers.
STUDIES OF THE TRIAD : I. Structure of the Junction in Frog Twitch Fibers.
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对三合会的研究：I。Frog Twitch纤维中的结构。
DOI：
10.1083/jcb.47.2.488
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发表时间：
1970-11-01
影响因子：
7.8
通讯作者：
Franzini-Armstrong, C
中科院分区：
文献类型：
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作者：
Franzini-Armstrong, C
本文研究了蛙肌纤维中肌浆网（SR）与横管（T）系统在三联体上的连接结构。该连接由SR侧囊和T系统小管的平坦表面形成，它们彼此面对120-140 A的距离。在约300埃的周期性间隔处，SR膜形成小突起，其尖端通过一些非晶材料连接到T系统膜。SR突起和无定形材料在这里被称为SR脚。足被布置成两个平行的行，两个这样的行存在于T系统小管的两侧。脚之间的连接区域显然是空的。支脚覆盖不超过T系统表面积的30%和SR总面积的3%。这种解释的交界结构的功能意义进行了讨论。
The structure of the junction between sarcoplasmic reticulum (SR) and transverse tubular (T) system at the triad has been studied in twitch fibers of the frog. The junction is formed by flattened surfaces of the SR lateral sacs and the T-system tubule, which face each other at a distance of 120–140 A. At periodic intervals of about 300 A, the SR membrane forms small projections, whose tips are joined to the T system membrane by some amorphous material. The SR projections and the amorphous material are here called SR feet. The feet are disposed in two parallel rows, two such rows being present on either side of the T-system tubule. The junctional area between the feet is apparently empty. The feet cover no more than 30% of the T system surface area and 3% of the total SR area. The functional significance of this interpretation of the junctional structure is discussed.