Statistical analysis of enzyme activity levels of 4–6 day old SOD1-null and SOD+ control flies under benign conditions.

Mean (OD units) ± SEM is given for each enzyme for both SOD1-null and SOD+ control. ANCOVA was performed for each enzyme to determine statistically significant differences between SOD1-nulls and SOD+ controls. Significant differences are denoted by ‘*’. The ‘% Difference’ describes the difference in enzyme activity of SOD1-nulls compared to SOD+ controls.