ID 3.2.1.201 DE exo-chitinase (reducing end). CA Hydrolysis of N,N'-diacetylchitobiose from the reducing end of chitin and CA chitodextrins. CC -!- The enzyme hydrolyzes the second glycosidic (1->4) linkage from CC reducing ends of chitin and chitodextrin molecules, liberating CC N,N'-diacetylchitobiose disaccharides. cf. EC 3.2.1.200. //