Ribosomes of bacteria, archaea, and eukaryotes

The ribosomes of E. coli and of archaeal species (such as Sulfolobus solfataricus) are similar in rRNA and protein content, whereas mammalian ribosomes are somewhat differentThe ribosomes of E. coli and of archaeal species (such as Sulfolobus solfataricus) are similar in rRNA and protein content, whereas mammalian ribosomes are somewhat different

Bacterial (E. coll) Archaeal (S. so/fataricus) Eukaryotic (mammalian) 23s rRNA 23s rRNA Km 285 'RNA . . _ _ (4718 nucleotides) (2904 nucleotides) (3049 nucleotides) rgéfiisubunu + 55 rRTuA ss rRirVA V isog'm 5'85 “RNA . . ’ (160 nucleotides) (120 nucleotides) (125 nucleotides) ‘WM and 34 proteins and 27 proteins 55 rR-.l-\l A (120 nucleotides) 165 rRNA and 49 proteins (1541 nucleotides) and 21 proteins 165 rRNA (1496 nucleotides) and 19 proteins 18S rRNA (1874 nucleotides) and 34 proteins 70$ ribosome 80$ ribosome