mesaconate + succinyl-CoA <=> 2-methylfumaryl-CoA + succinate
mesaconate + succinyl-coa <=> 2-methylfumaryl-coa + succinate
mesaconate + succinyl-CoA <=> 2-methylfumaryl-CoA + succinate
mesaconate + succinyl-coa <=> 2-methylfumaryl-coa + succinate