Results 321 to 330 of about 38,830 (350)

ENZYMATIC DEGRADATION OF RIBONUCLEOPROTEINS

American Journal of Botany, 1951
THE ACTION of crystalline enzymes in degrading cellular substrates of fixed tissues can be determined by suitable staining procedures. Thus, as Brachet (1940) has shown, tissues that have been incubated in ribonuclease and then stained with Unna's combination of methyl green and pyronin show little or no color in cytoplasm and nucleoli, whereas these ...
Berwind P. Kaufmann, Helen Gay, Margaret R. McDonald   +2 more
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Informational ribonucleoprotein particles of newt oocytes: Polyribosome-associated ribonucleoproteins

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1974
Various species of rapidly labelled, informational ribonucleoproteins can be isolated from homogenates of newt oocytes. Polyribosome-associated ribonucleoprotein can be separated from heterogeneous nuclear ribonucleoprotein and free cytoplasmic ribonucleoprotein by sucrose gradient centrifugation.
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Ribonucleoproteins of Uukuniemi virus are circular [PDF]

Journal of Virology, 1975
The internal ribonucleoprotein (RNP) of Uukuniemi virus was released with Triton X-100 and analyzed on sucrose gradients. Three species of RNP sedimenting at 140 to 150, 105 to 120, and 85 to 90S could be separated. All of them contained the same ratio of core polypeptide (mol wt, 25,000) to RNA. Eelctron microscopy using rotatory shadowing showed that
C H von Bonsdorff, Ralf F. Pettersson
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The Phlebovirus Ribonucleoprotein: An Overview

In negative strand RNA viruses, ribonucleoproteins, not naked RNA, constitute the template used by the large protein endowed with polymerase activity for replicating and transcribing the viral genome. Here we give an overview of the structures and functions of the ribonucleoprotein from phleboviruses.
Ferron, François, Lescar, Julien
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Biogenesis of small nucleolar ribonucleoproteins

Current Opinion in Cell Biology, 2002
Eukaryotic cells contain a very complex population of small nucleolar RNAs. They function, as small nucleolar ribonucleoproteins, in pre-ribosomal RNA processing reactions, and also guide methylation and pseudouridylation of ribosomal RNA, spliceosomal small nuclear RNAs, and possibly other cellular RNAs.
Vanda Pogacic, Witold Filipowicz
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The nucleolus: a site of ribonucleoprotein maturation

Current Opinion in Cell Biology, 2003
The nucleolus is the site of ribosomal RNA synthesis, processing and ribosome maturation. Various small ribonucleoproteins also undergo maturation in the nucleolus, involving RNA modification and RNA-protein assembly. Such steps and other activities of small ribonucleoproteins also take place in Cajal (coiled) bodies.
Anton V. Borovjagin, Thilo S. Lange, Susan A. Gerbi   +2 more
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CHARACTERIZATION OF BRAIN RIBONUCLEOPROTEIN PARTICLES

Journal of Neurochemistry, 1979
Abstract— Brain RNP particles were characterized to determine whether they play a role in the regulation of brain protein synthesis. RNP particles were isolated from the postribosomal supernatant of cerebral hemispheres of young rabbits, employing conditions which minimize adventitious protein‐RNA interactions.
James B. Mahony, Ian R. Brown
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Ribonucleoprotein interaction with mammalian monosomes

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1968
Abstract A subcellular fraction containing RNA and protein was prepared from rabbit reticulocytes. This fraction had a sedimentation behavior which was different from reticulocyte ribosomal subunits, and was capable of stimulating polypeptide synthesis in a mammalian cell-free system.
Austin S. Weisberger, Steven A. Armentrout   +1 more
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Changes in hepatic ribonucleoproteins in Kwashiorkor

The Indian Journal of Pediatrics, 1973
Using the toluidine blue-ammonium molybdate staining method, different types of RNPs were demonstrated in the hepatocytes of patients with kwashiorkor. DCR-I and DCR-III were found to be reduced. Nucleolar chromatin and nucleolar parachromatin showed an apparent increase.
Vasudha Agarwal, T. P. Bharadwaj
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A Ribonucleoprotein from Amphibian Gastrulæ

Nature, 1958
DISAGGREGATION of amphibian embryos by agents which chelate calcium is succeeded by re-aggregation if the cells are returned to a medium containing calcium1. It is customary to consider that the removal of calcium from the environment of the cells is responsible for the loss of adhesion displayed in disaggregation.
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