• 한국미생물·생명공학회지
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• 제28권3호
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• pp.156-160
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• 2000

국내 부존자원인 inulin을 이용하여 fructose syrup 또는 oligosacharide를 생산한는 효소를 발굴하기 위하여 전국적으로 토양 등 시료를 채취하여 inulinase 생성 미생물을 분리하였으며 inulinase 활성이 높은 96-1 균주를 동정한 결과 그람 양성균인 Arthrobacter protophormiae/ramosus인 것으로 잠정 동정되었다 Inulinase 생산을 위한 최적 배지는 무기염류 기초배지에 각 1%(w/v)의 inulin tryptone. $NH_4Cl$이 함유된 배지였으며 퇴적 발효조건은 $35^{\circ}C$초기 pH 7.5 통기량 1vvm 교반속도 200rpm이었다.

• 한국미생물·생명공학회지
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• 제28권4호
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• pp.214-218
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• 2000

The inulinase producing microorganism was isolated from soil and tentatively identified as Arthrobacter protophormiae/ramosus. Inulinase was pruified by ethanol precipitation, DEAE-Sephadex ion exchange chromatography and Sephadex gel filtration chromatography. The molecular weight of the purified enzyme was 34 kDa. The specific activity, yield and purity were 31.5 Unit/mg, 19.5% and 18.5 fold, respectively. Optimal pH and temperature for reaction of the purified inulinase were 8.5 and $55^{\circ}C$, respectively. The enzyme was stable at pH 7.5, below$ 55^{\circ}C$, and the activity was stimulated Mg2+.