Abstract
1. From Aspergillus niger, β-glucosidase preparation with very high activity (Fph.-β-g., 1050) was obtained by means of repeated tannin precipitation followed by adsorption with aluminum hydroxide gel B.
2. This preparation contained 15.7 per cent of nitrogen and no ash.
3. The preparation is almost free from oligases such as a-gluco-sidase, maltase, α- and β-galactosidase with a very minute content of saccharase.
The author wishes to express his gratitude to Prof. Tomoo Miwa for his constant advice and helpful criticism. Thanks are also due to Miss Sumiko Ishikawa for her technical assistance throughout this work.
