Studies on superoxide dismutase. I. Purification and properties of superoxide dismutase from Azotobacter vinelandii-230.

Superoxide dismutase Superoxide dismutase

Purification and properties of superoxide dismutase from Drosophila melanogaster.

The major superoxide dismutase ("slow" electromorph) of the fruit fly, Drosophila melanogaster, has been purified to homogeneity. This enzyme contains 2 Cu2+ and 2 Zn2+/molecule. The ultraviolet absorption spectrum indicates a lack of tryptophan. This enzyme has a molecular weight of 32,000 and is composed of two subunits of equal size, which are joined by noncovalent interactions. Cyanide at 1...

The purification and properties of superoxide dismutase from Neurospora crassa.

Soluble extracts of Neurospora crassa contain a single, electrophoretically distinct, superoxide dismutase. This enzyme has been isolated and has been found to be a bluegreen, copperand zinc-containing enzyme, similar to that already described from bovine tissues and from garden peas. The molecular weight was ,approximately 31,000, and the enzyme appeared to be composed of 2 subunits of equal s...

Superoxide Dismutase from Lens esculenta: Purification and Properties.

Superoxide dismutase has been purified to homogeneity from Lens esculenta cotyledons and shoots. The two forms appeared to be identical. The purified enzyme contained two electrophoretically distinct bands. It contained two ions of Cu and two ions of Zn. Gel filtration experiments indicate a molecular weight of about 33,000. The spectrum of ultraviolet and visible regions and electron paramagne...

Effect of Superoxide Dismutase

This study assesses the effect of the superoxide anion scavenger superoxide dismutase on myocardial capillary permeability-surface area (PS) products for small hydrophilic molecules after ischemia and reperfusion. Open-chest dogs underwent a 20-minute occlusion of the left anterior descending coronary artery followed by 1 hour of reperfusion. Myocardial plasma flow rate and capillary extraction...