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• W2275335788 abstract "Invertase (&#x3B2;-D-fructosfuranosidase, EC 3.2.1.26)는 설탕을 포도당과 과당으로 가수분해하는 반응을 촉매한다. 3종류의 invertases [액포(수용성 산), 세포질(수용성 알칼리) 및 세포벽 결합]가 식물에서 연구되어 왔다. 우리는 순차적인 ammonium sulfate 침전, 이온교환크로마토그래피, 흡수크로마토그래피, Green-19 친화크로마토그래피 과정을 통해 완두콩(Pisum sativum L.) 발아체로부터 중성 invertase의 세포막 연결 isoform을 430배 순수 분리하였다. 분리된 세포막과 결합 된insoluble invertase (IN-INV)는 최적 pH는 중성에서 알칼리 사이(pH 6.8-7.5)로 나타났다. 이 효소는 Tris 뿐만 아니라 Hg²⁺ and Cu²⁺와 같은 중금속에 의해 저해되었다. IN-INV 의 K_m과 V_max 값은 각각 12.95 mM과 2.98 U/min으로 측정되었다. IN-INV는 기질로써 과당뿐만 아니라 라피노오스와 반응하기 때문에 진정한 &#x3B2;-fructofuranosidase로 판명되었다. IN-INV의 분자량 20 kDa이었다. 위 결과로 볼 때 GA 영향으로 급속히 자라는 발아체에서 단백질이 분리되었는데 특징적으로 invertase였다. Invertase (&#x3B2;-D-fructosfuranosidase, EC 3.2.1.26) catalyzes the hydrolysis of sucrose into D-glucose and D-fructose. Three biochemical subgroups of invertases have been investigated in plants: vacuolar (soluble acid), cytoplasmic (soluble alkaline), and cell wall-bound (insoluble acid) invertases. An isoform of neutral invertase was purified from pea seedlings (Pisum sativum L.) and treated with gibberellic acid (GA) by sequential procedures consisting of ammonium sulfate precipitation, ion-exchange chromatography, absorption chromatography, and reactive green-19 affinity chromatography. The results of the overall insoluble invertase purification were a 430-fold increase. The purified neutral invertase was not glycosylated and had an optimum pH between neutral and alkaline (pH 6.8-7.5). It was inhibited by Tris, as well as by heavy metals, such as Hg²⁺ and Cu²⁺. Typical Michaelis&#x2013;Menten kinetics were observed when the activity of the purified invertase was measured, with sucrose concentrations up to 100 mM. The K_m and V_max values were 12.95 mM and 2.98 U/min, respectively. The molecular mass was around 20 kDa. The sucrose-cleaving enzyme activity of this enzyme is similar to that of sucrose synthase and fructosyltransferase, but its biochemical characteristics are different from those of sucrose synthase and fructosyltransferase. Based on this biochemical characterization and existing knowledge, neutral INV is an invertase isoform in plants." @default.
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• W2275335788 date "2015-09-30" @default.
• W2275335788 modified "2023-10-04" @default.
• W2275335788 title "Characterization of Neutral Invertase from Fast Growing Pea (Pisum sativum L.) Seedlings after Gibberellic Acid (GA) Treatment" @default.
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• W2275335788 doi "https://doi.org/10.5352/jls.2015.25.9.1021" @default.
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