Extended Data Fig. 1: Chromatin landscape and expression domain of foxN2/3 is conserved.

Chromatin accessibility nearby foxN2/3 in H. erythrogramma (top, orange) and H. tuberculata (bottom, green), including seven open chromatin regions (OCRs). In-situ hybridization of foxN2/3 in blastula-stage b, H. erythrogramma and c, H. tuberculata embryos. Micrographs derive from a single round of in-situ experiments for each species.