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. 2014 Sep 2;16(2):210–218. doi: 10.1111/mpp.12178

Figure 1.

figure

A simplified schematic representation of transcriptional regulatory networks of the Arabidopsis thaliana circadian clock. Arrows indicate activation and perpendicular bars represent repression. Circadian Clock Associated 1/Late elongated HYpocotyl (CCA1/LHY) represses the expression of Timing Of CAB2 expression 1 (TOC1) and evening‐expressed Early FLowering 3 and 4 (ELF4) and LUX Arrhythmo (LUX) via binding to evening element (EE). CCA1 also activates the transcription of PRR9 and PRR5. PRRs are transcriptional repressors and RVEs (REVEILLE) function as transcriptional activators. TOC1, an evening‐expressed component, represses the expression of other PRR's. EC, evening complex (ELF3, ELF4 and LUX together form an EC); PRRs, pseudo‐response regulators. Adapted from Hsu and Harmer (2014).