Fig. 7
From: The EC-HDA9 complex rhythmically regulates histone acetylation at the TOC1 promoter in Arabidopsis

Working diagram of the EC-HDA9 complex in circadian control. Transcript accumulation of TOC1 correlates with H3ac levels at the gene promoter. As-yet-unidentified HAT catalyzes H3ac at the TOC1 promoter during the daytime. After peak expression, the ELF3 protein, presumably evening complex (EC), recruits HDA9. The EC-HDA9 complex binds to the TOC1 promoter and removes H3ac at neighboring sites to decline its expression during nighttime