Porcine superoxide dismutase
- 1 May 1981
- journal article
- research article
- Published by Springer Nature in Molecular and Cellular Biochemistry
- Vol. 36 (3), 157-161
- https://doi.org/10.1007/bf02357032
Abstract
A cuprozinc superoxide dismutase has been isolated from pig liver. The enzyme is similar to previously described cuprozinc superoxide dismutases in that it is a dimer of about 32 000 molecular weight consisting of approximately two equally sized subunits, and 2 atoms of copper and two atoms of zinc per molecule. It differs, however, from previously described cuprozinc superoxide dismutases because of its higher isoelectric point; pI 6.8 vs 4.9 for bovine enzyme. The diffusion coefficient for the porcine enzyme was determined to be 7.53×10−7 cm2s−1, while the equivalent spherical hydrodynamic radius was computed as 28.5 Å. The enzyme was observed to undergo self-association with time. Sulfhydryl interaction is postulated to be involved.Keywords
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