S100A2 and Patent ductus arteriosus: A clustering analysis of ChIP-seq data against H3K27ac and p63 showed that two squamous-like ΔNp63-expressing PDA cultures have a unique enhancer configuration with enrichment of H3K27ac and p63 at enhancers near genes expressed in the squamous subtype of PDA, such as S100A2 or KRT5, suggesting that the enhancer landscape of PDA tumors resembles cells of a squamous cell lineage and is linked to p63 occupancy [127].