由曲霉属微生物发酵产生的一种α—淀粉酶，能水解淀粉中的α-1,4-葡萄糖苷键，能将淀粉切断成长短不一的短链糊精和少量的低分子糖类，广泛应用于洗涤行业。

 A α-amylase produced by fermentation of Aspergillus, which hydrolyzes α-1,4-glucoside bonds in starch, cuts starch into short-chain dextrins of different lengths and small amounts of low-molecular-weight sugars, widely used in the washing industry.