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Significance Circadian clocks regulate gene expression levels to allow an organism to anticipate environmental conditions. These clocks reside in all the major branches of life and confer a competitive advantage to the organisms that maintain them. The clock in the fungusNeurospora crassa is an excellent model for basic understanding of core circadian architecture as well as for filamentous fungi. Here, we identify genes whose expression is clock regulated; indeed, as much as 40% of the transcriptome may be clock regulated, broadly directing daytime catabolism and nighttime growth. Both transcriptional control and posttranscriptional regulation play major roles in control of cycling transcripts such that DNA binding of transcription factors alone appears insufficient to set the phase of circadian transcription.

Analysis of clock-regulated genes in Neurospora reveals widespread posttranscriptional control of metabolic potential