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通过硫酸铵沉淀、阴离子交换层析和柱层析从节杆菌(Arthrobacter sp.)粗酶制剂分离纯化得到β-1,3葡聚糖内切酶。经SDS凝胶电泳和柱层析测得纯化酶为单体酶,分子量为32.5kDa;纯化酶N末端的10个氨基酸序列为APGDLLWSDE,在pH5~8之间稳定,最适pH6.5,最适温度55℃,但50℃以上失活很快。纯化酶对昆布4,5,6,7糖及昆布多糖底物的米氏常数分别为0.12,0.11,0.067,0.066mM和0.16mg/mL,也可水解热凝胶和地衣多糖,葡糖苷内切酶H(Streptomy