O-succinyl-L-homoserine + L-cysteine = L,L-cystathionine + succinate + H(+)
o-succinyl-l-homoserine + l-cysteine = l,l-cystathionine + succinate + h(+)
"O-succinylhomoserine synthetase"
"o-succinylhomoserine synthetase"