RET, or Retinoic Acid Receptor, is a protein that plays a crucial role in regulating gene expression in the body. It is part of the nuclear receptor family, which means it helps control how cells respond to hormones and other signaling molecules. RET is particularly important in the development of the nervous system and is involved in processes like cell growth and differentiation. Mutations in the RET gene can lead to various health issues, including certain types of cancer and endocrine disorders. Understanding RET's function helps researchers develop targeted therapies for these conditions, making it a significant focus in medical research and genetics.