title: Once there were twenty.
authors.affiliation: Department of Biology, 68-671A, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
authors.forename: U L
authors.initials: UL
authors.lastname: RajBhandary
mesh_terms: D000604:Amino Acyl-tRNA Synthetases / Q000378:metabolism; D001412:Bacillus subtilis / Q000201:enzymology / Q000235:genetics*; D005057:Eukaryotic Cells / Q000378:metabolism; D005798:Genes, Bacterial; D005975:Glutamate-tRNA Ligase / Q000378:metabolism; D006094:Gram-Positive Bacteria / Q000378:metabolism; D019884:Nitrogenous Group Transferases / Q000235:genetics*; D014176:Protein Biosynthesis; D012352:RNA, Transfer, Glu / Q000378:metabolism*
chemical_list: D012352:RNA, Transfer, Glu; D019884:Nitrogenous Group Transferases; C047694:glutamyl-tRNA(Gln) amidotransferase; D000604:Amino Acyl-tRNA Synthetases; D005975:Glutamate-tRNA Ligase; C020659:glutaminyl-tRNA synthetase