Reaction catalyzed by 1,3-alpha-isomaltosidase (3.2.1.204), isomaltose glucohydrolase (3.2.1.205) show all sequences for 3.2.1.205
cyclobis-(->6)-alpha-nigerosyl
+2
H2O
=2
cyclobis-(->6)-alpha-nigerosyl
+
2 H2O
=
2 isomaltose