THE EFFECT OF CHEMICAL MODIFICATION OF ZINC MYOGLOBIN ON THE PHOTOINDUCED ELECTRON-TRANSFER WITH METHYL VIOLOGEN

被引：4
|
作者：
AONO, S [1 ]
OHTAKA, A [1 ]
OKURA, I [1 ]
机构：
[1] TOKYO INST TECHNOL,DEPT BIOENGN,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1995年 / 96卷 / 01期
关键词：
FLASH PHOTOLYSIS; LASER FLASH PHOTOLYSIS; MYOGLOBIN; PHOTOINDUCED ELECTRON TRANSFER; ZINC;
D O I：
10.1016/1381-1169(94)00032-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The chemical modification of zinc protoporphyrin reconstituted myoglobin (ZnPP-Mb) by succinic anhydride gave four kinds of the modified zinc myoglobins (ZnPP-Mb(F2)-ZnPP-Mb(F5)) in which the modification site was different. When ZnPP-Mb(F2)-ZnPP-Mb(FS) were excited in the presence of methyl viologen, photoinduced electron transfer took place between the photoexcited triplet state of zinc myoglobin and methyl viologen to form the separated ion pair. The quenching rate constant by methyl viologen was 3.1, 4.5, 5.4 and 6.6 x 10(7) M(-1) s(-1) for ZnPP-Mb(F2), (F3), (F4) and (F5), respectively. The quenching rate constant was thought to be larger for the sample modified near the specific reaction site.
引用
收藏
页码：87 / 92
页数：6
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