Figure 3.
Transcriptional regulation of circadian gene expression. Protein and regulatory element names are as defined in the text. Arrows, sequence of events triggered by CLOCK–BMAL1 binding to E-boxes; dashed lines, influence of transcription factors; chromatin remodeling factors, factors that alter chromatin structure; phase variation, regulation of nascent RNA cycling phase; parentheses, possible explanation for phenomena. See text for detailed description.