title: The stimulatory effect of ammonium or potassium ions on the activity of leucyl-tRNA synthetase from Escherichia coli.
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D002247:Carbon Isotopes; D004926:Escherichia coli / Q000201:enzymology*; D007930:Leucine / Q000378:metabolism*; D008025:Ligases / Q000378:metabolism*; D008094:Lithium / Q000494:pharmacology; D011188:Potassium / Q000494:pharmacology*; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D012343:RNA, Transfer / Q000096:biosynthesis*; D012964:Sodium / Q000494:pharmacology
chemical_list: D000596:Amino Acids; D002247:Carbon Isotopes; D000644:Quaternary Ammonium Compounds; D012343:RNA, Transfer; D008094:Lithium; D012964:Sodium; D008025:Ligases; D007930:Leucine; D011188:Potassium