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Studies on kinetics of reactions between phycobiliproteins and hydroxyl radicals by a pulse radiolytic technique |
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| Authors: | Suping Zhang Side Yao Wenfeng Wang Jie Xie Jianping Zhang Jingquan Zhao Lijin Jiang |
| Affiliation: | (1) Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, 100080 Beijing, China;(2) Laboratory of Radiation Chemistry, Chinese Academy of Sciences, Shanghai Institute of Nuclear Research, 201800 Shanghai, China;(3) Present address: Institute of Photographic Chemistry, Chinese Academy of Sciences, 100101 Beijing, China |
| Abstract: | Scavenging of hydroxyl radical (· OH) by phycobiliproteins (C-phycocyanin, Allophycocyanin and R-phycoerythrin) was studied by competitive kinetics methods. Hydroxyl radicals were generated from pulse radiolysis of aqueous systems saturated with nitrous oxide (N2O). The experimental results indicated that the three types of phycobiliproteins are all strong scavengers of · OH, the rate constants are around (2.8-5.6)×109 L · mol-1 · s-1. |
| Keywords: | phycobiliprotein hydroxyl radical scavenging pulse radiolysis rate constant |
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