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Plant Physiology 55:1123-1124 (1975)
© 1975 American Society of Plant Biologists

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Articles

Peroxidative Activity in Euglena gracilis1

Richard H. Brown, Neville Collins and Michael J. Merrett

a Postgraduate School of Studies in Biological Sciences, University of Bradford, Bradford, Yorkshire BD7 1DP England

Cell-free homogenates of Euglena gracilis contain very low levels of catalase activity as compared to higher plants and some other algae. Purified Euglena cytochrome c acts catalytically as a peroxidase. The observed catalytic activity of cytochrome c in extracts from heterotrophically grown cells was more than enough to account for the observed rates of hydrogen peroxide destruction. The peroxidative activity of Euglena cytochrome c was completely inhibited by 20 mM 3-amino-1,2,4-triazole.

1 This research was supported by S.R.C. Grant B/RG/24209 to M.J.M.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1975 by the American Society of Plant Biologists