Supplementary Figure 11: ATAC-seq signal distribution in amphioxus Hox-neighboring regions.

(a,b) ATAC-seq profiles of the anterior (a) and posterior (b) regions showing accessible chromatin regions. The ATAC signal is depicted in black, except in cases having overlap with repetitive elements (gray) or transcriptional start sites (green). Elements tested in reporter assays are colored in blue (anterior) and red (posterior). Regions overlapping with the Evx loci ±5 kb are shaded in light red.