SUGAR-BINDING PROTEIN, PERIPLASMIC BINDING PROTEIN, 4, TOGB, PECTIN DEGRADATION, YERSINIA ENTEROCOLITICA, 5-UNSATURATED DIGALACTURONIC ACID STRUCTURE OF A PERIPLASMIC OLIGOGALACTURONIDE BINDING PROTEIN FROM YERSINIA ENTEROCOLITICA IN COMPLEX WITH 4,5- UNSATURATED DIGALACTURONIC ACID 2UVI