tRNA(Lys) + L-homoserine + H(+) => L-homoseryl-tRNA(Lys) + H2O
trna(lys) + l-homoserine + h(+) => l-homoseryl-trna(lys) + h2o
tRNA(Lys) + L-homoserine + H(+) => L-homoseryl-tRNA(Lys) + H2O
trna(lys) + l-homoserine + h(+) => l-homoseryl-trna(lys) + h2o