Endohydrolysis of (1->6)-alpha-D-glucosidic linkages in dextran. Because of the indeterminate molecular weight of dextran, an approximate KM value of 0.3738 mg/ml was determined. Optimum pH is 4.5. Optimum temperature is 35 degrees Celsius. On the 2D-gel the determined pI of this protein is: 4.5, its MW is: 158 kDa.