tRNA(Thr) + L-threonine + ATP => L-threonyl-tRNA(Thr) + AMP + diphosphate + H(+)
trna(thr) + l-threonine + atp => l-threonyl-trna(thr) + amp + diphosphate + h(+)
tRNA(Thr) + L-threonine + ATP => L-threonyl-tRNA(Thr) + AMP + diphosphate + H(+)
trna(thr) + l-threonine + atp => l-threonyl-trna(thr) + amp + diphosphate + h(+)