Many genes are functionally related to high-altitude physiology, such as angiogenesis (RGCC), pulmonary hypertension remodeling (PLA2G12A), oxygen intake (C9ORF3), neural response (GRID1 and GRIN2B), melanin synthesis (MITF, PDGFRB and PIK3R3) and heart development (FOXS1, GAA and MYLK2). This evidence concerns the gene FOXS1 and pulmonary arterial hypertension.