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isopullulanase

n. (context enzyme English) An enzyme, pullulan 4-glucanohydrolase, that catalyses the hydrolysis of pullulan to isopanose (6-alpha-maltosylglucose).

Wikipedia
Isopullulanase

Isopullulanase is an enzyme with systematic name pullulan 4-glucanohydrolase (isopanose-forming). This enzyme catalyses the following chemical reaction

Hydrolysis of pullulan to isopanose (6-alpha-maltosylglucose)

The enzyme has no activity on starch.