ID 3.2.1.77 DE mannan 1,2-(1,3)-alpha-mannosidase. AN exo-1,2-1,3-alpha-mannosidase. CA Hydrolysis of (1->2)- and (1->3)-linkages in yeast mannan, releasing CA mannose. CC -!- A 1,6-alpha-D-mannan backbone remains after action on Saccharomyces CC cerevisiae mannan. CC -!- This is further attacked, but slowly. //