tRNA(His) + L-histidine + ATP <=> L-histidyl-tRNA(His) + AMP + diphosphate + H(+)
trna(his) + l-histidine + atp <=> l-histidyl-trna(his) + amp + diphosphate + h(+)
tRNA(His) + L-histidine + ATP <=> L-histidyl-tRNA(His) + AMP + diphosphate + H(+)
trna(his) + l-histidine + atp <=> l-histidyl-trna(his) + amp + diphosphate + h(+)