ID 3.2.1.124 DE 3-deoxy-2-octulosonidase. CA Endohydrolysis of the beta-ketopyranosidic linkages of 3-deoxy-D-manno-2- CA octulosonate in capsular polysaccharides. CC -!- The enzyme from a bacteriophage catalyzes the depolymerization of CC capsular polysaccharides containing 3-deoxy-2-octulosonide in the CC cell wall of Escherichia coli. //