(R)-malate + succinyl-CoA <=> (R)-malyl-CoA + succinate
(r)-malate + succinyl-coa <=> (r)-malyl-coa + succinate
(R)-malate + succinyl-CoA <=> (R)-malyl-CoA + succinate
(r)-malate + succinyl-coa <=> (r)-malyl-coa + succinate