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        多酚氧化酶(菌菇)資料

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          2015年12月14日
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        多酚氧化酶(菌菇)資料
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        資料簡介

        英文名稱:Polyphenol oxidase;Tyrosinase from mushroom;Catechol Oxidase;Monophenol Monooxygenase;Monophenol, dihydroxyphenylalanine:oxygen oxidoreductase 
        其他名稱:酪氨酸酶;酥氨基酸酶;多聚苯酚氧化酶;兒茶酚氧化酶
        CAS號:9002-10-2
        級別:BR
        比活力:≥500units/mg protein
        活力定義:在含有L-二羥苯丙氨酸或兒茶酚和L-抗壞血酸的3ml反應混合液中,在pH值6.5,25℃時,每1min內ΔA265變化為0.001為一個酶活單位
        PH:6.0~7.0
        性狀(以下信息僅供參考):粉末。一類可催化含酚基化合物(如酪氨酸、酚類化合物等)氧化成醌的酶。此類酶廣泛存在于自然界,植物中分布很廣,如馬鈴薯、茶葉、漆樹乳汁中含量相當高。高等動物的皮膚、毛發、角膜中的黑色素也是由于此酶氧化酪氨酸所生成的產物。蘑菇等菌類及其他微生物中也產生此類酶。通常從野蘑菇中提取,系生物催化劑之一,含有銅離子的蛋白質。分子量約128 KDa 。等電點<5.0;含氮量約13.6%。含銅量約0.25%。紫外吸收峰在273nm和330nm處。催化作用適宜溫度25℃。
        用途:本品僅供科研,不得用于其它用途。(以下用途僅供參考)它催化酪氨酸氧化成多巴和多巴進一步氧化成能產生黑色素的前體物——多巴醌。
        保存:-20℃
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