EPAS1 (Endothelial PAS Domain Protein 1): Also known as HIF-2alpha, EPAS1 is a transcription factor that responds to low oxygen levels in tissues. It plays a significant role in the physiological adaptation to hypoxia, regulating genes involved in erythropoiesis, iron metabolism, and vascularization. EPAS1 is implicated in high-altitude adaptation and various diseases, including certain cancers....