INTRA-MOLECULAR ELECTRON-TRANSFER AND BINDING CONSTANTS IN IRON HEXACYANIDE-CYTOCHROME-C COMPLEXES AS STUDIED BY PULSE-RADIOLYSIS

被引:13
作者
ILAN, Y
SHAFFERMAN, A
机构
[1] HEBREW UNIV JERUSALEM,DEPT PHYS CHEM,JERUSALEM 91000,ISRAEL
[2] ISRAEL INST BIOL RES,NESS ZIONA,ISRAEL
关键词
Cytochrome c; Electron transfer; Iron hexacyanide; Pulse radiolysis;
D O I
10.1016/0005-2728(79)90197-X
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Internal oxidation and reduction rates of horse cytochrome c in the complexes CII · Fe(III) (CN)3-6 and CIII · Fe(II) (CN)4-6, are 4.6 · 104s-1 and 3.3 · 102s-1, respectively. The binding site of the iron hexacyanide ions on either CII or CIII are kinetically almost indistinguishable; binding constants range from 0.87 · 103 to 2 · 103M-1. The present pulse radiolytic kinetic data is compared with that from NMR, T-jump and equilibrium dialysis studies. © 1979.
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页码:161 / 165
页数:5
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