Asn-tRNA in Lactobacillus bulgaricus is formed by asparaginylation of tRNA and not by transamidation of Asp-tRNA

adn amino acid sequences arn arn de transferencia arn de transfert asparagina asparagine chemical composition chromosome chromosomes composition chimique cromosomas dna escherichia coli gene genes lactobacillus bulgaricus ligasas ligase ligases mutant mutantes mutants rna transfer rna transferasas transferase transferases