Abstract
For the purpose of obtaining microorganisms capable of producing alkaline protease inhibitor, screening test was carried out. One strain of microorganisms (No. S-3253) showed strong ability to produce alkaline protease inhibitor. The morphological and physiological characteristics of strain S-3253 were studied. This strain was found to belong to Streptomyces albogriseolus. When the strain S-3253 was cultivated at 45°C with a medium containing 4% polypepton, 2% starch, 0.1% yeast extract, 0.1% NaCl, 0.1% K2HPO4 and 0.05% MgSO4-7H2O in shake-flasks (pH 7.0), the highest activity was obtained after 40_??_48 hr cultivation.
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