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(+) => trna(his) + l-histidine + atp