Circadian regulation of <i>GstD1</i> expression.

<p>(A) A circadian rhythm in <i>GstD1</i> mRNA levels was detected in wild type (CS) flies with a peak at ZT 8 significantly different from the trough at ZT 20 (p<0.01). (B) No significant difference was observed between ZT 8 and ZT 20 in <i>per⁰¹</i> and <i>cyc⁰¹</i> flies while the difference was observed in CS heads (p<0.01). Data represent average values (± SEM) obtained from 3 independent bio-replicates and normalized to ZT 0. Data were analyzed by a 2-way ANOVA and Bonferroni's post-tests. Different subscript letters indicate significant difference between treatment groups.