title: In vivo synthesis of tRNA Tyr  1  and tRNA Tyr  2 : differences in "early" and "late log" E. coli MRE 600.
mesh_terms: D000604:Amino Acyl-tRNA Synthetases / Q000302:isolation & purification; D000645:Ammonium Sulfate; D002247:Carbon Isotopes; D011232:Chemical Precipitation; D002848:Chromatography, DEAE-Cellulose; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004926:Escherichia coli / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D012343:RNA, Transfer / Q000096:biosynthesis* / Q000302:isolation & purification; D046249:Transfer RNA Aminoacylation; D014316:Tritium; D014443:Tyrosine
chemical_list: D002247:Carbon Isotopes; D014316:Tritium; D014443:Tyrosine; D012343:RNA, Transfer; D000604:Amino Acyl-tRNA Synthetases; D000645:Ammonium Sulfate