Abstract

Total superoxide dismutase activity was found to increase during development of the fruit fly ( Drosophila melanogaster) with an increase of 346% occurring between the larval and the one-day-old adult stage. During the adult stage total superoxide dismutase activity did not vary with age. Throughout the period of rapid increase in total superoxide dismutase there was a correspondingly rapid increase in total copper content. A continued increase in copper content during the adult stage suggested, however, that copper levels were not determining total superoxide dismutase activity during adult ageing. The cyanide-insensitive or mitochondrial superoxide dismutase reached a maximum at 8 days of age and declined by 21% between 8 and 58 days of age.

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