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An acidophilic and Ca2+-independent amylase was purified from a newly isolated Bacillus sp. DR90 by ion-exchange chromatography, and exhibited a molecular weight of 68.9 kDa by SDS-PAGE. The optimum pH and temperature of the enzyme were found to be 4.0 and 45 °C, respectively. The enzyme activity was increased by Ba2+, Fe2+ and Mg2+, and decreased by Hg2+(More)
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