PITX2 (Paired Like Homeodomain 2): PITX2 is a transcription factor that plays a vital role in the development of various organ systems, including the eyes, heart, and abdominal organs. It is responsible for establishing the body's left-right asymmetry. Mutations in PITX2 are associated with Axenfeld-Rieger syndrome, a disorder affecting the eyes and other organs. Understanding PITX2 is essential for developmental biology and for developing treatments for related congenital conditions.