“…Together, they control genes encoding all key enzymes for hexuronate utilisation, specifically, oxidoreductase UxuB and mannonate dehydratase UxuA, glucuronidase UidA, glucuronate/galacturonate isomerase UxaC, hexuronate transporters ExuT and GntP, and glucuronide transporters UidB and UidC. Moreover, both regulators serve as autorepressors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Initially, UxuR was believed to be responsible for the expression of all genes coding for enzymes and transporters related to glucuronate metabolism [ 5 , 7 , 9 ], while ExuR—for galacturonate metabolism [ 2 , 3 , 6 , 7 ].…”