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polyribosomes

Pronunciation: pol'e-ri'bo-somz

Definition: 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

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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