tRNA(Sec) + L-serine + ATP <=> L-seryl-tRNA(Sec) + AMP + diphosphate + H(+)
trna(sec) + l-serine + atp <=> l-seryl-trna(sec) + amp + diphosphate + h(+)
tRNA(Sec) + L-serine + ATP <=> L-seryl-tRNA(Sec) + AMP + diphosphate + H(+)
trna(sec) + l-serine + atp <=> l-seryl-trna(sec) + amp + diphosphate + h(+)