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. Author manuscript; available in PMC: 2009 Sep 19.
Published in final edited form as: Biochem Biophys Res Commun. 2008 Jul 15;374(2):299–303. doi: 10.1016/j.bbrc.2008.07.011

Figure 3.

Figure 3

(A) Catalase mRNA expression does not exhibit significant fluctuations in Drosophila CSp or per01heads. (B) Catalase enzymatic activity did not show significant rhythm in CSp and per01 heads but was significantly lower (p<0.05) in per01 flies compared with CSp flies. Error bars represent ± SEM while asterisks (*) represent significant (p<0.05, n=9, two-way ANOVA with Bonferroni's post test) differences between activity in CSp and per01 flies. (C) Challenge with H2O2 resulted in inhibition of CAT activity in both CSp and per01 flies. The inhibition was sharp with a significant (p<0.05) decrease in activity from 0−12 hours post exposure at ZT8. At ZT20, the decrease was Ler and not significant between 4−12 h post-exposure. In all treatments, the inhibition was more severe in per01 than CSp. Error bars represent ± SEM and columns with different superscripts differ significantly at p<0.05, unpaired Students t-test.