| 摘要 |
1,240,620. Dextranase. SANKYO CO. Ltd. 1 Oct., 1969 [3 Oct., 1968; 5 Nov., 1968; 24 Jan., 1969; 10 May, 1969], No. 48361/69. Heading C3H. A process for the production of dextranase comprises culturing a dextranase-producing micro-organism of the genus Chaetomium, Streptomyces, Gibberella, Gloeosporium, Glomerella, Humicola, Anixiella, Sporotrichum or Macrosporium in a fermentation medium and recovering from said medium the dextranase which accumulates therein. The organism may be Chaetomium spirale, C. gracile, C. subspirale, C. bostrychodes, Streptomyces cinnamorensis, S. flavovirens, S. griseocameus, S. griseolus, Gibberella fujikuroi, G. saubinetti, Gloeosporium kaki, G. laeticolor, G. olivarum, Glomerella fructigena, G. lagenaria, Humicola grisea, Sporotrichum asteroides, Anixiella reticulata or Macrosporium bataticola. Culture may be on solid or liquid media, surface or submerged. Dextran may be added to the medium to induce dextranase formation. Isolation may be by concentration under reduced pressure, precipitation with sodium sulphate, sodium chloride, methanol, ethanol, or acetone, adsorption, precipitation with a protein precipitating agent or at the isoelectric point and/or electrodialysis.
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