Glucoamylases break down the α-1,4-glucosidic bonds in amylase and amylopectin. Pullulanases break down α-1,6-glucosidic bonds in amylopectin. These two enzymes work synergistically to quickly hydrolyze amylopectin and amylose. That allows brewers to achieve the high attenuation targets and short reaction times ultra-light beers need.
Glucoamylases hydrolyze starch. They break α-1,4-glucosidic linkages at the non-reducing ends of amylase and amylopectin. Pullulanases also hydrolyze starch, but they're de-branching enzymes. They break down α-1,6-glucosidic bonds in amylopectin.
Glucoamylases are typically brewers' first choice when producing highly attenuated beers. Consumers know these as light or low-calorie beers.
Combined with pullulanases, glucoamylases speed up starch breakdown even more. That's why brewers use this synergistic enzyme blend in ultra-light beer production. It allows them to reach attenuation targets in even shorter conversion times.
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