Abstract:
:The muscle membrane of slow and fast fibers in cruralis and iliofibularis muscles and of intermediate fibers in submaxillaris muscle of the frog is studied in freeze-fracture replicas. A comparison of membrane folds, number, size and distribution of caveolae and of intramembrane particles (IMP) is given. In slow muscle fibers, the membrane folds are systematically present at the level of the I zone with a transversal continuity, whereas in fast and intermediate types the membrane folds are small and are randomly distributed. In slow muscle the caveolae are more numerous at the I zone than in the part corresponding to the center of the sarcomere. In fast muscle, small groups of caveolae form linear patterns, and in intermediate fibers the distribution is random. The number of caveolae in slow muscle fibers is two times more than in fast and intermediate fibers. The mean area of caveolae opening is largest in fast and smallest in slow muscle fibers. The number of IMP is significantly different in the three types of fibers, being highest in slow and lowest in intermediate fibers. The different pattern of folds in slow fibers may correspond to the different contractile properties of this fiber type. The presence of double the number of caveolae in slow fibers correlated to the less elaborate T system in this fiber type shows the possibility that slow fibers may be the result of an arrest during development for the performance of a different function. The difference in IMP density in the three muscle fiber types may be interpreted as the difference in their electrical properties.
journal_name
Eur J Cell Bioljournal_title
European journal of cell biologyauthors
Verma Vsubject
Has Abstractpub_date
1984-09-01 00:00:00pages
122-8issue
1eissn
0171-9335issn
1618-1298journal_volume
35pub_type
杂志文章abstract::Centromeres support the assembly of the kinetochore on every chromosome and are therefore essential for the proper segregation of sister chromatids during cell division. Centromere identity is regulated epigenetically through the presence of the histone H3 variant CENP-A. CENP-A regulation and incorporation specifical...
journal_title:European journal of cell biology
pub_type: 杂志文章,评审
doi:10.1016/j.ejcb.2011.04.016
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abstract::Differences in the carbohydrate composition were found in the jellies and the cortex of the unfertilized Xenopus laevis egg using lectins and blood group antibodies. Blood group H trisaccharide was detected in the outer jelly and "A-like" oligosaccharide was found in the inner jelly. The blood group A trisaccharide wa...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00
abstract::Centaurin alpha-1 is a high-affinity PtdIns(3,4,5)P3-binding protein enriched in brain. Sequence analysis indicates centaurin alpha-1 contains two pleckstrin homology domains, ankyrin repeats and an Arf GAP homology domain, placing it in the AZAP family of phosphoinositide-regulated Arf GAPs. Other members of this fam...
journal_title:European journal of cell biology
pub_type: 杂志文章
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更新日期:2004-10-01 00:00:00
abstract::In response to hypotonic stress, cells of the inner medullary collecting duct (IMCD) undergo swelling followed by a regulatory volume decrease (RVD) and a transient release of organic osmolytes such as sorbitol. In this study, we tested the hypothesis whether membrane recycling is involved in the latter process. There...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract::The neural cell adhesion molecule (NCAM) plays a key morphoregulatory role during neural development. Patterns of NCAM expression were investigated in cultured astrocytes exhibiting distinct states of morphological differentiation. In vitro differentiation of confluent primary cultures of astrocytes was enhanced by a ...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1993-12-01 00:00:00
abstract::Carbonic anhydrase (CA) XII, an extracellular enzyme involved in the regulation of the microenvironment acidity and tumor malignant phenotype, was originally identified as a protein overexpressed in some types of cancers, including breast cancer. However, the cellular function and mechanism of CAXII remained unclear. ...
journal_title:European journal of cell biology
pub_type: 杂志文章
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更新日期:2010-08-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章,评审
doi:10.1016/j.ejcb.2015.01.001
更新日期:2015-03-01 00:00:00
abstract::To investigate the association of calmodulin (CaM) with microtubules (MTs) in the mitotic apparatus (MA), the distributions of both CaM and tubulin were examined in mitotic PtK1 cells in which MT subclasses had been selectively removed or altered by treatment with cold or with the MT inhibitor, nocodazole. A fluoresce...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00
abstract::Microbodies containing bipyramidal crystalline nucleoid inclusions occur within every cortical cell in roots of Yucca torreyi. Reaction product deposition attributable to catalase, glycolate oxidase, and urate oxidase activities are cytochemically localized to Yucca root microbodies and classifies them as unspecialize...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1984-07-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1981-12-01 00:00:00
abstract::This report describes the characterization of the nuclear lamin CeLam-1 of the nematode Caenorhabditis elegans by molecular analysis of the corresponding complete cDNA and gene sequences. The primary structure of CeLam-1, representing only the third non-vertebrate lamin sequence currently known, follows essentially th...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1993-12-01 00:00:00
abstract::Gap junctions are transmembrane structures that directly connect the cytoplasm of adjacent cells, making intercellular communications possible. It has been shown that the behaviour of several tumours - such as bone tumours - is related to gap junction intercellular communications (GJIC). Several methodologies are avai...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:10.1016/j.ejcb.2017.01.003
更新日期:2017-03-01 00:00:00
abstract::Chlorpromazine (CPZ) at minimally effective concentrations accumulates mammalian cells in mitosis without lethal effects on the cells. Star-metaphase morphology similar to effects seen with classical antimitotic compounds probably results from the preferential action of CPZ on a specific class of microtubules--the pol...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1983-09-01 00:00:00
abstract::In this study we have used primary cultures of porcine superior cervical ganglia as a model system to study exo-endocytosis in sympathetic neurons. Pure neuronal cultures with a defined noradrenergic phenotype can be obtained when antimitotics are included in the culture medium, and the high yield from prenatal piglet...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1997-11-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:10.1078/0171-9335-00297
更新日期:2003-03-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1994-10-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1983-05-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1985-05-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1983-07-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1981-10-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1992-12-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1981-02-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1984-03-01 00:00:00
abstract::The central feature of fluid and electrolyte secretion by salivary acinar cells is transepithelial Cl- movement as a driving force for the secretion. However, little is known about the membrane localization and regulation by agonists of various anion channels. To characterize the anion transport and fluid secretion, w...
journal_title:European journal of cell biology
pub_type: 杂志文章
doi:10.1078/S0171-9335(04)70021-7
更新日期:2000-03-01 00:00:00
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1991-12-01 00:00:00
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pub_type: 杂志文章
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journal_title:European journal of cell biology
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00