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polyribosome
(redirected from Polyribosomes)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
pol·y·ri·bo·some  (pl-rb-sm)
n.
A cluster of ribosomes connected by a strand of messenger RNA and actively synthesizing protein. Also called polysome.

polyribosome [ˌpɒlɪˈraɪbəˌsəʊm]
n
(Life Sciences & Allied Applications / Biochemistry) Biochem an assemblage of ribosomes associated with a messenger RNA molecule, involved in peptide synthesis Also called polysome


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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).
Most studies to date indicate that RNAi occurs in the cytoplasm by acting on translating polyribosomes.
The cytoplasm also contained some mitochondria, granular endoplasmic reticulum, single ribosomes and polyribosomes, and Golgi complexes (Figure 5).
 
 
 
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