L-seryl-tRNA(Sec) + selenophosphate + H(+) = L-selenocysteinyl-tRNA(Sec) + phosphate
l-seryl-trna(sec) + selenophosphate + h(+) = l-selenocysteinyl-trna(sec) + phosphate
L-seryl-tRNA(Sec) + selenophosphate + H(+) = L-selenocysteinyl-tRNA(Sec) + phosphate
l-seryl-trna(sec) + selenophosphate + h(+) = l-selenocysteinyl-trna(sec) + phosphate