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Plant Physiology 68:275-278 (1981)
© 1981 American Society of Plant Biologists

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Articles

Distribution of Iron-Containing Superoxide Dismutase in Vascular Plants 1,2

Susan M. Bridges and Marvin L. Salin

Department of Biochemistry, Mississippi State University, Mississippi State, Mississippi 39762

Superoxide dismutases (EC 1.15.1.1) in vascular plants representing different evolutionary levels were characterized using polyacrylamide gel electrophoresis. The three forms of the enzyme were distinguished from each other based on the following criteria: a) the Cu-Zn enzyme is sensitive to cyanide wherease the Fe and Mn enzymes are not; and b) the Cu-Zn and Fe enzymes are inhibited by H2O2 whereas the Mn enzyme is H2O2-resistant. Of the 43 plant families investigated, the Fe-containing superoxide dismutase was found in three families: Gingkoaceae, Nymphaceae, and Cruciferae.

1 This material is based upon work supported, in part, by the Competitive Research Grants Office of the United States Department of Agriculture under Agreement 7900023. This work was also supported by funds made available by the Mississippi Agricultural and Forestry Experiment Station.

2 Mississippi Agricultural Forestry Experiment Station Publication No. 4679.




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Copyright © 1981 by the American Society of Plant Biologists