... crystals of the ternary complex of S cerevisiae ArgRS, Arg and tRNAArgICG grow contains tRNA, l -Arg, ATP and Mg2+ at sufficient concentrations for the aminoacylation reaction, and (NH4)2SO4 and ... no means in a conformation that is fit to activate The fact that kcat and Km for tRNAArg in the aminoacylation reaction not change in the Asn106 fi Ala, Gln111 fi Ala and Phe109 fi Ala mutants of S ... codon usages for AGA and AGG codons are 19 and 34, respectively, and they amount to 98% among six codons for Arg The D-loops of isoacceptor tRNAUCU and tRNACCU contain nine (AGCAGGAC20aA) and...