ID 3.2.1.197 DE beta-1,2-mannosidase. CA beta-D-Manp-(1->2)-beta-D-Manp-(1->2)-D-Manp + H2O = alpha-D- CA mannopyranose + beta-D-mannopyranosyl-(1->2)-D-mannopyranose. CC -!- The enzyme, characterized from multiple bacterial species, catalyzes CC the hydrolysis of terminal, non-reducing D-mannose residues from CC beta-1,2-mannotriose and beta-1,2-mannobiose. CC -!- The mechanism involves anomeric inversion, resulting in the release CC of alpha-D-mannopyranose. CC -!- Activity with beta-1,2-mannotriose or higher oligosaccharides is CC higher than that with beta-1,2-mannobiose. //