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\label{fig:4}  \textbf{ \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} mutant shows rhythmic circadian locomotion and transcriptional oscillation of \emph{period}.}  \\  \textbf{(a)} Averaged activity profiles of second day of three LD cycle (LD, left panel), second day of DD cycle (DD, middle panel) and throughout the behavioral analysis (2 LD + 7 DD) are shown. White, black and gray bar denote light phase, dark phase and subjective light phase, respectively.  The number of flies (n=37-54) , period (n = 26-50), (n=26-50),  power of rhythmicity (P-S) and percentage of rhythmic flies (rhythmicity) are indicated in right panel. \textbf{(b)} Transcriptional oscillation of \emph{period} gene in \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} in DD. rp49 was used for normalization.a.u., arbitrary unit.  Data are represented as mean $\pm$ SEM.  a.u., arbitrary unit.