FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes

The structure of the membranes of sarcoplasmic reticulum (SR), tubular (T) system, and sarcolemma has been studied by freeze fracture in leg muscles of the Tarantula spider. Two regions of the sarcoplasmic reticulum can be differentiated by the distribution of particles on the fracture faces: a junc...

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Autor principal: Franzini-Armstrong, Clara
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1974
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2109291/
https://www.ncbi.nlm.nih.gov/pubmed/4827910
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author Franzini-Armstrong, Clara
author_facet Franzini-Armstrong, Clara
author_sort Franzini-Armstrong, Clara
collection PubMed
description The structure of the membranes of sarcoplasmic reticulum (SR), tubular (T) system, and sarcolemma has been studied by freeze fracture in leg muscles of the Tarantula spider. Two regions of the sarcoplasmic reticulum can be differentiated by the distribution of particles on the fracture faces: a junctional SR, at the dyads, and a longitudinal SR, elsewhere. The dyads are asymmetric junctions, the disposition of particles in the apposed membranes of SR and T tubules being different from one another and from the regular arrangement of feet in the junctional gap. It is concluded that no channels can be visualized to directly connect SR- and T-system lumina.
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spelling pubmed-21092912008-05-01 FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes Franzini-Armstrong, Clara J Cell Biol Article The structure of the membranes of sarcoplasmic reticulum (SR), tubular (T) system, and sarcolemma has been studied by freeze fracture in leg muscles of the Tarantula spider. Two regions of the sarcoplasmic reticulum can be differentiated by the distribution of particles on the fracture faces: a junctional SR, at the dyads, and a longitudinal SR, elsewhere. The dyads are asymmetric junctions, the disposition of particles in the apposed membranes of SR and T tubules being different from one another and from the regular arrangement of feet in the junctional gap. It is concluded that no channels can be visualized to directly connect SR- and T-system lumina. The Rockefeller University Press 1974-05-01 /pmc/articles/PMC2109291/ /pubmed/4827910 Text en Copyright © 1974 by The Rockefeller University Press This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
Franzini-Armstrong, Clara
FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title_full FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title_fullStr FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title_full_unstemmed FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title_short FREEZE FRACTURE OF SKELETAL MUSCLE FROM THE TARANTULA SPIDER : Structural Differentiations of Sarcoplasmic Reticulum and Transverse Tubular System Membranes
title_sort freeze fracture of skeletal muscle from the tarantula spider : structural differentiations of sarcoplasmic reticulum and transverse tubular system membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2109291/
https://www.ncbi.nlm.nih.gov/pubmed/4827910
work_keys_str_mv AT franziniarmstrongclara freezefractureofskeletalmusclefromthetarantulaspiderstructuraldifferentiationsofsarcoplasmicreticulumandtransversetubularsystemmembranes

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