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Plant Physiology 69:161-165 (1982)
© 1982 American Society of Plant Biologists

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Articles

Isolation and Characterization of an Iron-Containing Superoxide Dismutase From Water Lily, Nuphar luteum1

Marvin L. Salin and Susan M. Bridges

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

A cyanide-insensitive superoxide dismutase (EC 1.15.1.1) was purified from leaves of the water lily Nuphar luteum (L.) Sibth. and Smith Subsp. macrophyllum (Small) Beal. The enzyme had a molecular weight of 46,000 and was composed of two equally sized subunits. Metal analysis showed the protein to contain about 1 gram atom of iron per dimer. The iron-containing superoxide dismutase was sensitive to H2O2 as well as to azide. Antibody to the protein did not cross-react with iron superoxide dismutase isolated from the eucaryote Brassica or with algal extracts.

1 Supported by funds made available by the Mississippi Agricultural and Forestry Experiment Station. Mississippi Agricultural and Forestry Experiment Station Publication No. 4883.




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Copyright © 1982 by the American Society of Plant Biologists