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Ontology Browser

Parent Terms Term With Siblings Child Terms
arciform density 
aster +   
bacterial nucleoid +  
bacterial thylakoid +  
chlorosome +  
chromosome +   
contractile fiber +   
contractile vacuole complex +  
cytoskeleton +   
gas vesicle +  
goblet cell theca 
kinetochore +   
lipid droplet +   
mitochondrial cloud 
mitochondrial nucleoid +   
nucleolus +   
nucleolus-like body 
plastid nucleoid +  
podosome +   
polyhedral organelle +  
ribonucleoprotein granule +   
ribosome +   
An intracellular organelle, about 200 A in diameter, consisting of RNA and protein. It is the site of protein biosynthesis resulting from translation of messenger RNA (mRNA). It consists of two subunits, one large and one small, each containing only protein and RNA. Both the ribosome and its subunits are characterized by their sedimentation coefficients, expressed in Svedberg units (symbol: S). Hence, the prokaryotic ribosome (70S) comprises a large (50S) subunit and a small (30S) subunit, while the eukaryotic ribosome (80S) comprises a large (60S) subunit and a small (40S) subunit. Two sites on the ribosomal large subunit are involved in translation, namely the aminoacyl site (A site) and peptidyl site (P site). Ribosomes from prokaryotes, eukaryotes, mitochondria, and chloroplasts have characteristically distinct ribosomal proteins.
spindle +   
synaptic ribbon 
transmembrane actin-associated (TAN) line 

Narrow Synonyms: free ribosome ;   membrane bound ribosome
Related Synonyms: ribosomal RNA
Alternate IDs: GO:0033279
Xrefs: NIF_Subcellular:sao1429207766 ;   Wikipedia:Ribosome
Definition Sources: ISBN:0198506732

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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.