• The Korean Journal of Food And Nutrition
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• v.11 no.5
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• pp.565-569
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• 1998

The strain BY-445 which produces new inhihitors of ${\alpha}$-amylase was isolated from a soil sample and identified. The aerial hyphae of this strain develope in the from of open spirals. The spore chain of BY-445 strain appears in spiral shape with spiny surface. Melanoid and soulble pigments were not observed. Gelatin was liquefied, and skin milk and starch was also hydrolyzed. The isolate contained LL-diaminopimelic acid in its cell wall hydrolysate. The content of fatty acid 16:iso, 15:0 anteiso and 16:0 was 25:30, 16.19 and 13.16%, respectively. BY-445 strain was closely related to Streptomyces violaceusinger but it was different from this strain in some cultural and physiological characteristics. This strain was, therefore, designated as Streptomyces sp. BY 445.

• Proceedings of the Korean Society for Applied Microbiology Conference
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• 1978.10a
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• pp.207.5-208
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• 1978

Effects of the plant growth regulator (P. G. R.)on the reaction of proteinase, $\gamma-amylase$ and acid phosphatase were investigated, and also were the conditions of production of P. G. R. by Stroptomyces sp. 445. The P. G. R. had no effect on the act ivities of such enzymes in mung bean seedling. But in germinating seed previously treated with P. G. R. it effected the activity of protease in cotyledon. In the conditions of production of P. G. R., the maxim, activity was appeared in shaking cutlure at $30^{\circ}C$ for 5 days, and by the addition of peptone or casein hydrolysate as nitrogen source, soluble starch as carbon source, and sulfur as metal ion.