<p>UCSC genome browser view of the <i>krox20</i> locus showing gene positions (purple), repetitive sequences (black) and the sequences selected for enhancer activity tests (light blue), including those that showed activity (named A to F). Below are ATAC-seq data from experiments performed at the indicated stages, either on whole embryos (95% epiboly) or dissected hindbrain or posterior regions of the embryos (5s and 15s), as shown on the schematics on the right side. The seven mostly significant peaks located in non-coding sequences are highlighted in yellow. Underneath is a Vista browser view of sequence conservation between zebrafish and mouse (black) over the region.</p
