PMID: 2489098Dec 1, 1989Paper

Proton n.m.r. of ferredoxin from Clostridium pasteurianum

International Journal of Biological Macromolecules
L SkjeldalT Ljones

Abstract

Proton magnetic resonance spectra at 500 MHz are reported for the oxidized and reduced forms of the 2[4Fe-4S]-ferredoxin from Clostridium pasteurianum. The reduced protein showed additional peaks in the 10-60 ppm region, which were previously unobserved, and there were significant differences between oxidized and reduced states in the whole region. The electron exchange rate in partially reduced ferredoxin is slow on the n.m.r. time scale when reduced with sodium dithionite, but fast when zinc reduced methyl viologen is used as reducing agent. We explain the difference between fast and slow exchange as being due to the different chemical properties of the two reducing agents.

References

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Nov 1, 1972·Proceedings of the National Academy of Sciences of the United States of America·E L PackerJ C Rabinowitz
Dec 31, 1973·Annals of the New York Academy of Sciences·E L PackerJ C Rabinowitz
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Feb 19, 1971·Biochemical and Biophysical Research Communications·M PoeW H Orme-Johnson
Jan 1, 1980·Annual Review of Biochemistry·W V Sweeney, J C Rabinowitz

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