ribosome (redirected from ribosomal)

ribosome /ri·bo·some/ (ri´bo-sōm) any of the intracellular ribonucleoprotein particles concerned with protein synthesis; they consist of reversibly dissociable units and are found either bound to cell membranes or free in the cytoplasm. They may occur singly or occur in clusters (polyribosomes).riboso´mal

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ri·bo·some (rb-sm)

n.

A minute round cytoplasmic particle composed of RNA and protein that is the site of protein synthesis as directed by mRNA.

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ribo·somal (-sml) adj.

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ribosome

[rī′bəsōm]

Etymology: ribose + Gk, soma, body

an organelle composed of RNA and protein that functions in the synthesis of protein. Ribosomes interact with messenger RNA and transfer RNA to link amino acid into a polypeptide chain in a sequence determined by the sequence of nucleotides in the messenger RNA. Ribosomes may exist singly, in clusters as polysomes, or attached to the "rough" endoplasmic reticulum. See also translation.

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ribosome [ri´bo-sōm]

any of the intracellular ribonucleoprotein organelles concerned with protein synthesis, found either bound to cell membranes or free in the cytoplasm. They may occur singly or in clusters (polyribosomes). The genetic code is translated when ribosomes attach to messenger RNA.

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ribosome

ribonucleoprotein particles concerned with protein synthesis; they consist of two, one large and one small, reversibly dissociable units (called also 50S and 30S subunits) that are found either bound to cell membranes, particularly rough endoplasmic reticulum, or free in the cytoplasm. They may occur singly or in clusters, called polyribosomes or polysomes, which are ribosomes linked by mRNA and are actively engaged in protein synthesis.

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ribosome binding site

a nucleotide sequence near the 5′ terminus of mRNA required for binding of mRNA to the small ribosomal subunit. Called also Shine-Dalgarno sequence.