Production of the raw-starch digesting amylase of Aspergillus sp. K-27

Summary Aspergillus sp. K-27, isolated from soil, produced extracellular glucoamylase and -amylase using wheat starch as a carbon source, and its productivity was doubled by the addition of -methyl-d-glucoside to the medium. The crude enzyme preparation, which was found to be a mixture of 70% glucoamylase and 30% -amylase, well degraded not only cereal starches but also tuber and root starches, and the initial velocity for potato starch was 72% of that for corn starch.