deletions | additions       diff --git a/Results_clock.tex b/Results_clock.tex  index 28c60e5..c998e2f 100644  --- a/Results_clock.tex  +++ b/Results_clock.tex 
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As in other animals, sleep in \emph{Drosophila} is regulated by the circadian clock, meaning clock mutants generally show altered sleep phenotypes\cite{hendricks:2003aa, parisky:2008aa}.  We therefore asked whether the increased sleep observed in DmCa\textsubscript{v}3-null flies can be attributed to a disruption of the circadian clock.  After monitoring their activity over seven days of continuous darkness, we found that most  \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} flies have a slightly elongated period length (24.3 $\pm$ 0.6 vs. 23.9 $\pm$ 0.2), a significantly  reduced power of rhythmicity (22.3 $\pm$ 2.9 vs. 53.4 $\pm$ 5.1), and a  reduced overall percentage of rhythmic flies (70.3\% vs. 92.6\%) when compared to \emph{w\textsuperscript{1118}}.  Still, most \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} flies are rhythmic \emph{w\textsuperscript{1118}}  (Fig. \ref{fig:4}a). The reductions in rhythmicity we observed may be circadian phenotype of \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} flies is unlikely  due to an increase problems  insleep during  the transition between subjective day and subjective night.  Consistent with a functional core  circadian clock, as  transcriptional oscillation of \emph{period}, one of the core clock genes, \emph{period}  is normal (Fig. \ref{fig:4}b).  Since the sleep phenotypes of \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} flies are already rather subtle, it is difficult to say whether the altered circadian parameters (i.e., the elongated period and reduction  in rhythmic power) of  \emph{DmCa\textsubscript{v}3\textsuperscript{Gal4}} flies (Fig. \ref{fig:4}b). are an independent phenotype or whether they are secondary to the increased sleep during the transition between subjective day and subjective night.  Thus, these results suggest that the increase in sleep caused by loss of DmCa\textsubscript{v}3 cannot be attributed to a direct effect on the molecular clock.