The brush border bound hydrolase linked with sucrase is
a. In intestinal mucosa → Sucrase — iso maltase complex, which is found as the proenzyme on the one
polypeptide chain but active enzyme (sucrase and isomaltase) on separate polypeptide chain and:
i. Sucrase hydrolyzed sucrose into glucose and fructose
ii. Isomaltase hydrolyzed 1→6 bonds in a-limit dextrins into glucose
b. Isomaltase hydrolyzed α-dextrin, that is why is called α-dextrinase hence sucrase - α-dextrinase complex.