Also found in: Medical, Encyclopedia, Wikipedia.


A cluster of ribosomes that is connected by a strand of messenger RNA and is active in protein synthesis. Also called polysome.


(Biochemistry) biochem an assemblage of ribosomes associated with a messenger RNA molecule, involved in peptide synthesis. Also called: polysome


(ˈpɒl iˌsoʊm)

a complex of ribosomes that lines up along a strand of messenger RNA and translates the genetic code during protein synthesis.
[1960–65; poly- + (ribo) some]
Mentioned in ?
References in periodicals archive ?
ATP is one of the important components in forming polyribosome and protein synthesis and its derivatives.
Peripheral blood mononuclear cells stimulated with C5a or lipopolysaccharide to synthesize equivalent levels of IL-1[beta] mRNA show unequal IL-1[beta] protein accumulation but similar polyribosome profile.
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).
This would lead to the dissembly of polyribosomes (Lin and Glazer, 1981), incomplete methylation (Almstedt et al.
Fragile-X mental retardation protein (FMRP) is a protein involved in ferrying RNA transcripts to polyribosomes located at sites of protein synthesis.