Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Studies on Superoxide Dismutase. I. Purification and Properties of Superoxide Dismutase from Azotobacter vinelandii-230
GUI-MIN LUO, WEI LI, LIAN-XING ZHENG, YU-HUA CHENG, SUSUMU FUNAKOSHI, HARUAKI YAJIMA
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Keywords: iron-superoxide dismutase, Azotobacter vinelandii-230, purification, amino acid composition, superoxide dismutase isoenzyme, metalloenzyme, pyrogallol autoxidation inhibition assay
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1987 Volume 35 Issue 10 Pages 4229-4234

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Abstract
In a cell-free extract of Azotobacter vinelandii-230, at least four electromorphologically different components possessing superoxide dismutase activity were detected. One component was purified to homogeneity. The purified enzyme (molecular weight 43000) consists of two noncovalently interacting subunits of equal size. Metal analysis indicated the presence of iron, 2 mol/mol-dimer. The amino acid composition (ca. 153 residues) was determined.
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© The Pharmaceutical Society of Japan
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