a 5'-end ribonucleotide-tRNA(His) + GTP + ATP + H2O => a 5'-end phospho-guanosine-ribonucleotide-tRNA(His) + AMP + 2 diphosphate + H(+)
a 5'-end ribonucleotide-trna(his) + gtp + atp + h2o => a 5'-end phospho-guanosine-ribonucleotide-trna(his) + amp + 2 diphosphate + h(+)
a 5'-end ribonucleotide-tRNA(His) + GTP + ATP + H2O => a 5'-end phospho-guanosine-ribonucleotide-tRNA(His) + AMP + 2 diphosphate + H(+)
a 5'-end ribonucleotide-trna(his) + gtp + atp + h2o => a 5'-end phospho-guanosine-ribonucleotide-trna(his) + amp + 2 diphosphate + h(+)