polyribosomes


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pol·y·ri·bo·somes

(pol'ē-rī'bō-sōmz),
Conceptually, two or more ribosomes connected by a molecule of messenger RNA; structures satisfying this concept can be seen in electron micrographs and can be sedimented at rates consistent with aggregates of ribosomes (whence it is often, sometimes incorrectly, assumed that aggregates containing ribosomes are true polyribosomes); polyribosomes are active in protein synthesis.
Synonym(s): polysomes

pol·y·ri·bo·somes

(pol'ē-rī'bō-sōmz)
Two or more ribosomes connected by a molecule of messenger RNA.
Synonym(s): polysomes.
References in periodicals archive ?
Sassone-Corsi, "Orphan receptor DAX-1 is a shuttling RNA binding protein associated with polyribosomes via mRNA," Molecular and Cellular Biology, vol.
The proportion of ribosomes active in polyribosomes was measured in different developmental stages of the Antarctic sea urchin Sterechinus neumayeri.
Separation of the messenger RNA of reticulocyte polyribosomes.
Laforin, defective in the progressive myoclonus epilepsy of Lafora type, is a dual-specificity phosphatase associated with polyribosomes.
Most studies to date indicate that RNAi occurs in the cytoplasm by acting on translating polyribosomes.
FMRP associates with polyribosomes as an mRNP, and the 1304N mutation of severe fragile X syndrome abolishes this association.
Transmission electron microscopy revealed disorganized endoplasmic reticulum, dispersion of the polyribosomes, a variety of mitochondrial changes, and glycogen redistribution.
Export proteins are synthesized on polyribosomes bound to the rough endoplasmic reticulum of the hepatocyte; in contrast, protein destined for intracellular use are synthesized on free rather than bound polyribosome (Podolsky and Isselbacher, 1991).
Additional features of the tumor cells included moderately abundant mitochondria, stacks of rough endoplasmic reticulum, and polyribosomes.
Mercury compounds can bind to the RNA of tobacco mosaic viruses (Katz & Santilli, 1962), several synthetic polyribosomes, and yeast soluble RNA (Kawade, 1963).
As this technique is supposed to stain all the neurons because of the affinity of methylene blue by polyribosomes and all the neurons, regardless of physiologic features, have this organelle, we would then have the total number of neurons.