L-seryl-tRNA(Sec) + ATP = O-phospho-L-seryl-tRNA(Sec) + ADP
l-seryl-trna(sec) + atp = o-phospho-l-seryl-trna(sec) + adp
L-seryl-tRNA(Sec) + ATP = O-phospho-L-seryl-tRNA(Sec) + ADP
l-seryl-trna(sec) + atp = o-phospho-l-seryl-trna(sec) + adp