β-己糖胺酶(β-Hexosaminidase,缩写β-Hex)的全名是β-2-氨基乙酰-2-脱氧-D-己糖苷氨基乙酰脱氧己糖水解酶(EC3.2.1.52),当其作用于β-氨基己糖类底物时,显示出β-N-乙酰葡糖胺酶和β-N-乙酰半乳糖胺酶的活性。此二种酶的活性比值为8.6。故亦称此酶为足β-2-氨基乙酰-2-脱氧-D-葡糖苷氨基乙酰脱氧葡糖水解酶(缩写NAG,EC3.2.1.30)。β-Hex属外切糖苷酶,在酸性pH时,能催化水解存在于简单的糖苷、寡糖、多糖及复合糖(如糖脂、糖蛋白)之末端的β-N-乙酰氨基葡糖或β-N-乙酰氨基半乳 The full name of β-Hexosaminidase (abbreviated β-Hex) is β-2-aminoacetyl-2-deoxy-D-hexosaminyl aminoacetyldeoxyhexanohydrolase (EC 3.2.1.52) The β-N-acetylglucosaminidase and β-N-acetylgalactosaminidase activities are shown when they act on β-aminohexose substrates. The activity ratio of these two enzymes was 8.6. Therefore, this enzyme is also referred to as a foot beta-2-aminoacetyl-2-deoxy-D-glucosidase (abbreviated NAG, EC 3.2.1.30). β-Hex is an exoglycosidase that catalyzes the hydrolysis of β-N-acetylglucosamine present at the ends of simple glycosides, oligosaccharides, polysaccharides and complex carbohydrates (such as glycolipids, glycoproteins) at acidic pH or β-N- Acetamido galactose