L-homocysteine + pyruvate + NH4(+) => L,L-cystathionine + H2O
l-homocysteine + pyruvate + nh4(+) => l,l-cystathionine + h2o
L-homocysteine + pyruvate + NH4(+) => L,L-cystathionine + H2O
l-homocysteine + pyruvate + nh4(+) => l,l-cystathionine + h2o