Анотация: Extracellular b-glucosidase from the Antarctic yeast strain Cryptococcus albidus AL3 was isolated and purified by ultrafiltration, ion exchange chromatography and gel filtration. The purity of the enzyme preparations obtained was controlled by SDS-PAGE. The enzyme activity after gel filtration was 109 U/mg protein, the pH optimum was 5.0 and the temperature optimum was 45 рC. This enzyme retained 18 - 20 activity at 10 рC. It was inhibited by glucose and activated by ethanol. Some metal ions sach as Cu+2, Mg+2 and Mn+2 stimulated b-glucosidase activity, but it was inhibited by Hg+2 and Pb+2. The enzyme was active against different b-glucosides. The kinetic parameters for p-Nitrophenil-b-D-glucopyranoside were Km 0.64 mMol and Vmax - 140 U/mg