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单脱氢抗坏血酸还原酶(MDHAR)催化单脱氢抗坏血酸(MDHA)还原生成抗坏血酸(AsA),在抗坏血酸氧化还原代谢中发挥重要作用。 本试剂盒的测定原理为:MDHAR催化NADH还原MDHA生成AsA和NAD⁺,NADH在340 nm处具有特征吸收峰,而NAD⁺则无此吸收;通过测定340 nm处吸光度的下降速率,即可计算MDHAR的酶活性。
Monodehydroascorbate reductase (MDHAR) catalyzes the reduction of monodehydroascorbate (MDHA) to regenerate ascorbic acid (AsA), playing an important role in ascorbate redox metabolism. The principle of this kit is as follows: MDHAR catalyzes the NADH-dependent reduction of MDHA to AsA and NAD⁺. NADH exhibits a characteristic absorbance peak at 340 nm, whereas NAD⁺ does not. By measuring the rate of decrease in absorbance at 340 nm, the MDHAR enzyme activity can be calculated.