Click here to close
Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly.
We suggest using a current version of Chrome,
FireFox, or Safari.
The T-SR junction in contracting single skeletal muscle fibers.
Eisenberg BR
,
Eisenberg RS
.
???displayArticle.abstract???
The junction between the T system and sarcoplasmic reticulum (SR) of frog skeletal muscle was examined in resting and contracting muscles. Pillars, defined as pairs of electron-opaque lines bounding an electron-lucent interior, were seen spanning the gap between T membrane and SR. Feet, defined previously in images of heavily stained preparations, appear with electron-opaque interiors and as such are distinct from the pillars studied here. Amorphous material was often present in the gap between T membrane and SR. Sometimes the amorphous material appeared as a thin line parallel to the membranes; sometimes it seemed loosely organized at the sites where feet have been reported. Resting single fibers contained 39 +/- 14.3 (mean +/- SD; n = 9 fibers) pillars/micrometer2 of tubule membrane. Single fibers, activated by a potassium-rich solution at 4 degrees C, contained 66 +/- 12.9 pillars/micrometer2 (n = 8) but fibers contracting in response to 2 mM caffeine contained 33 +/- 8.6/micrometer2 (n = 5). Pillar formation occurs when fibers are activated electrically, but not when calcium is released directly from the SR; and so we postulate that pillar formation is a step in excitation-contraction coupling.
Caputo,
The effect of low temperature on the excitation-contraction coupling phenomena of frog single muscle fibres.
1972, Pubmed
Caputo,
The effect of low temperature on the excitation-contraction coupling phenomena of frog single muscle fibres.
1972,
Pubmed
Chandler,
Effects of glycerol treatment and maintained depolarization on charge movement in skeletal muscle.
1976,
Pubmed
Eisenberg,
Intracellular localization of markers within injected or cut frog muscle fibers.
1979,
Pubmed
,
Xenbase
Eisenberg,
Structural changes in single muscle fibers after stimulation at a low frequency.
1979,
Pubmed
,
Xenbase
Fawcett,
The ultrastructure of the cat myocardium. I. Ventricular papillary muscle.
1969,
Pubmed
Forbes,
Membrane systems in skeletal muscle of the lizard Anolis carolinensis.
1980,
Pubmed
Franzini-Armstrong,
Structure of sarcoplasmic reticulum.
1980,
Pubmed
Franzini-Armstrong,
Membrane particles and transmission at the triad.
1975,
Pubmed
Gordon,
Tension development in highly stretched vertebrate muscle fibres.
1966,
Pubmed
HILL,
The mechanics of active muscle.
1953,
Pubmed
Julian,
Sarcomere length non-uniformity in relation to tetanic responses of stretched skeletal muscle fibres.
1978,
Pubmed
Kelly,
The fine structure of skeletal muscle triad junctions.
1969,
Pubmed
Kelly,
Subunits of the triadic junction in fast skeletal muscle as revealed by freeze-fracture.
1979,
Pubmed
Makowski,
Gap junction structures. II. Analysis of the x-ray diffraction data.
1977,
Pubmed
Mathias,
Electrical models of excitation-contraction coupling and charge movement in skeletal muscle.
1980,
Pubmed
Merz,
[Distance measurement of directed structures in the microscope and its use in the determination of surface and volume relationship in bone tissue].
1968,
Pubmed
Oschman,
Calcium binding to intestinal membranes.
1972,
Pubmed
PAGE,
FILAMENT LENGTHS IN STRIATED MUSCLE.
1963,
Pubmed
Politoff,
The calcium binding sites of synaptic vesicles of the frog sartorius neuromuscular junction.
1974,
Pubmed
REYNOLDS,
The use of lead citrate at high pH as an electron-opaque stain in electron microscopy.
1963,
Pubmed
Sakai,
Caffeine contracture in muscle with disrupted transverse tubules.
1971,
Pubmed
Schneider,
Voltage dependent charge movement of skeletal muscle: a possible step in excitation-contraction coupling.
1973,
Pubmed
Simionescu,
Galloylglucoses of low molecular weight as mordant in electron microscopy. II. The moiety and functional groups possibly involved in the mordanting effect.
1976,
Pubmed
Somlyo,
Bridging structures spanning the junctioning gap at the triad of skeletal muscle.
1979,
Pubmed
Sommer,
The intermediate cisterna of the sarcoplasmic reticulum of skeletal muscle.
1980,
Pubmed
Sommer,
Filipin-cholesterol complexes in the sarcoplasmic reticulum of frog skeletal muscle.
1980,
Pubmed
Spray,
Peripheral couplings in adult vertebrate skeletal muscle. Anatomical observations and functional implications.
1974,
Pubmed
Walker,
The density attached to the inside surface of the apposed sarcoplasmic reticular membrane in vertebrate cardiac and skeletal muscle fibres.
1971,
Pubmed
Yoshioka,
Ultrastructural features of the sarcoplasmic reticulum during rapid cooling contracture and tetanus in frog skeletal muscle.
1981,
Pubmed
Yu,
Equatorial x-ray intensities and isometric force levels in frog sartorius muscle.
1979,
Pubmed