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Differences in amylase action pattern on amylopectin were demonstrated by the relation between the decrease in potassium iodide–iodine binding of waxy maize starch and the increase in reducing value during hydrolysis, as expressed by the RV 80 value (i.e., the reducing value for a potassium iodide–iodine binding value of 80% of that of the starting material). In the initial stages of the hydrolysis,...
Amylopectin fine structures were studied following limited hydrolysis of gelatinised waxy maize starch by amylases with a different level of inner chain attack (LICA). This was done by size exclusion chromatography as well as by debranching the (partially hydrolysed) amylopectin samples and studying the size distributions of the released chains. α-Amylases from Bacillus amyloliquefaciens and Aspergillus...
Several decades ago, the first reports on differences in action pattern between amylases from different sources indicated that the starch polymers are not degraded in a completely random manner. We here give an overview of different action patterns of amylases on amylose and amylopectin, focusing on the so-called multiple attack action of the enzymes. Nowadays, the multiple attack action is generally...
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