A proposed role for non-junctional transverse tubules in skeletal muscle as flexible segments allowing expansion of the transverse network

Using a variety of technical approaches, we have detected the presence of continuous triads that cover the entire length of T tubules in the main white body muscles of several small fish. This is in contrast to the discontinuous association of SR with T tubules in the red muscles from the same fish...

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Bibliographic Details
Main Authors: Manuela Lavorato, Ramesh Iyer, Clara Franzini-Armstrong
Format: Article
Language:English
Published: PAGEPress Publications 2019-05-01
Series:European Journal of Translational Myology
Subjects:
Online Access:https://www.pagepressjournals.org/index.php/bam/article/view/8264
Description
Summary:Using a variety of technical approaches, we have detected the presence of continuous triads that cover the entire length of T tubules in the main white body muscles of several small fish. This is in contrast to the discontinuous association of SR with T tubules in the red muscles from the same fish as well as in all other previously described muscles in a large variety of skeletal muscles. We suggest that continuous triads are permissible only in muscle fibers that are not normally subject to significant changes in sarcomere length during normal in vivo activity, as is the case for white muscles in the trunk of fish.
ISSN:2037-7452
2037-7460