Evidence for one leucyl transfer ribonucleic acid synthetase with specificity for leucine transfer ribonucleic acids with different coding characteristics.

Adenine Nucleotides Amino Acids Carbon Isotopes Chemical Precipitation Chromatography Chromatography, Ion Exchange Countercurrent Distribution Escherichia coli/enzymology Genetic Code Genetics, Microbial Leucine Ligases/isolation & purification Magnesium RNA, Bacterial RNA, Transfer Templates, Genetic Tritium

Adenine Nucleotides Amino Acids Carbon Isotopes RNA, Bacterial Tritium RNA, Transfer Ligases Leucine Magnesium