Data from ENCODE26 (link) were explored as described in eMethods. ChIP-seq experiments were performed on confluent HCASMC (Cell Applications 350-05a & Lonza CC-2583; cultured in SmGM-2 BulletKit media; Lonza) as described.27 (link) TCF21 (Abcam ab49475), Jun (Santa Cruz Biotechnology sc-1694), JunD (Santa Cruz Biotechnology sc-74), and CEBP (Santa Cruz Biotechnology sc-150) transcription factor binding was interrogated and H3K27ac data were acquired using the same ChIP protocol with an anti-H3K27ac antibody (Abcam; ab4729). Reads were aligned to the human genome (GRCh37p13) using STAR.28 (link)