L,L-cystathionine + H2O => L-homocysteine + L-serine
l,l-cystathionine + h2o => l-homocysteine + l-serine
L,L-cystathionine + H2O => L-homocysteine + L-serine
l,l-cystathionine + h2o => l-homocysteine + l-serine