基于pHBH法的岩藻聚糖硫酸酯酶酶活测定方法的建立
首发时间:2013-08-02
摘要:本文首先采用对羟基苯甲酰肼(pHBH)对岩藻糖进行显色,建立了测定岩藻糖还原端含量的pHBH法,该方法操作简便、灵敏度高,检测限为0.26 μg/mL,定量限为0.85 μg/mL。在此基础上,以Flavobacteriaceae sp. CZ1127产生的岩藻聚糖硫酸酯酶为实验材料,对岩藻聚糖硫酸酯酶活测定方法中的几个关键影响因素进行了研究,建立了一套快速可靠的岩藻聚糖硫酸酯酶酶活测定方法:准确移取375 μL 0.055%岩藻聚糖硫酸酯溶液,加入375 μL 稀释一定倍数的酶液,混匀后于28℃酶解反应30 min,然后加入pHBH试剂250 μL,100℃反应5 min,迅速冷却后于415 nm处测定吸光值,计算相应酶活。采用此方法,酶活检测限可以达到0.048 mU。
关键词: 食品科学 pHBH 岩藻糖 岩藻聚糖硫酸酯酶 糖苷酶
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The establishment of fucoidanase activity determination method on basis of pHBH method
Abstract:In this study, a new method using 4-Hydroxyben zhydrazide for the content determination of fucose reducing end was establided at frist. The detection limit of this method was 0.26 μg/mL and the quantification limit was 0.85 μg/mL. It possessed several advantages, including simple-operating, high precision and sensitivity. On base of this, we study some key factors for the fucoidanase activity detection. Then we built a fast and reliable fucoidanase activity detection method as follows: a mixture of 375 μL fucoidan solution with the concentration of 0.055% and 375 μL enzyme solution was frist reacted at 28℃ for 30minutes.After that 250 μL of pHBH was added in , the mixture was then reacted at 100 ℃ for 5 minutes. After cooling off, the absorbance was detemined at 415nm . Using this method, the fucoidanase activity detection limit was as low as 0.048 mU.
Keywords: Food science pHBH Fucose Fucoidanase Glucosidase
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基于pHBH法的岩藻聚糖硫酸酯酶酶活测定方法的建立
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