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Iron-containing and manganese-containing superoxide dismutases were found in Plectonema boryanum. The Mn-enzyme occupies about 10% of total activity. The Fe-enzyme was purified to near homogeneity. It contains 2 atoms of iron per mol. Its molecular weight is 41,700 and it is composed of two subunits of identical molecular weight without disulfide linkage. Amino acid composition is presented. Electron paramagnetic resonance spectrum revealed that iron occurs in a high spin ferric form and in some anisotropic environment. The absorption spectrum and the absence of acid-labile enzymes are insensitive to cyanide. Although the Fe-enzyme is sensitive to hydrogen peroxide, the Mn-enzyme is not.
K Asada, and
K Yoshikawa, and
M Takahashi, and
Y Maeda, and
K Enmanji
July 1971,
Virology,
K Asada, and
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K Enmanji
January 1973,
Nauchnye doklady vysshei shkoly. Biologicheskie nauki,
K Asada, and
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April 1971,
Journal of bacteriology,
K Asada, and
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January 1975,
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K Asada, and
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January 1970,
Archiv fur Mikrobiologie,
K Asada, and
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January 1977,
Mikrobiologiia,
K Asada, and
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January 1975,
Molecular & general genetics : MGG,
K Asada, and
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K Enmanji
March 1978,
Journal of bacteriology,
K Asada, and
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K Enmanji
September 1971,
Virology,
K Asada, and
K Yoshikawa, and
M Takahashi, and
Y Maeda, and
K Enmanji
February 1972,
Virology,
