Isomaltase

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Isomaltase is an enzyme which breaks the bonds linking saccharides, which cannot be broken by amylase or sucrase. It digests polysccharides at the alpha 1-6 linkages. Its substrate, alpha-limit dextrin, is a product of amylase digestion that retains its 1-6 linkage (its alpha 1-4 linkages having already been broken down by amylase). The product of the enzymatic digestion of alpha-limit dextrin by isomaltase is maltose.