Studies on kinetics of reactions between phycobiliproteins and hydroxyl radicals by a pulse radiolytic technique  

作　　者：ZHANG Suping YAO Side WANG Wenfeng XIE Jie ZHANG Jianping ZHAO Jingquan JIANG Lijin 

机构地区：[1]Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China [2]Laboratory of Radiation Chemistry,Chinese Academy of Sciences,Shanghai Institute of Nuclear Research,Shanghai 201800,China [3]Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Chinese Science Bulletin》2000年第10期899-903,共5页

摘　　要：Scavenging of hydroxyl radical (·OH) by phycobiliproteins (C-phycocyanin, Allophyco- cyanin 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·2 mol1 · s 1.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.

关 键 词：PHYCOBILIPROTEIN HYDROXYL radical SCAVENGING PULSE RADIOLYSIS rate constant. 

分 类 号：O643.1[理学—物理化学]