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Updated: Aug 9, 2026

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase
Published on: November 8, 2019
[Ability of catechin to eliminate O2-* and *OH]
Xiao-jie He1, Zhu-wen Yi, Yun Tian
1Laboratory of Pediatric Nephrology, Institute of Pediatrics, Second Xiangya Hospital, Central South University, Hunan Clinic Center of Pediatric Nephrology, Changsha. hexj7150@163.com
Objective:
To investigate the eliminating ability of catechin to eliminate O2-* and *OH.
Methods:
The ability of catechin to clear away O2-* and *OH was respectively measured by faintness chemiluminescence and spin trapping assay.
Results:
IC50 that catechin eliminated O2-* and *OH was 6.16, 0.59 g/mL respectively, and the eliminating ability of catechin was much stronger than that of the extract from liquorice, rosemary, grape pip, giant knotweed and ginkgo leaf.
Conclusion:
Compared with several important natural plants of antioxidants, the eliminating ability of cathechin is the best.
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