COUP-TFII also known as ARP-1, NR2F2 is a member of the steroid thyroid hormone superfamily of nuclear receptors. COUP-TFII plays a crucial role in various biological processes, particularly in gene expression regulation during development. COUP-TFII is primarily located in the nucleus, where COUP-TFII functions as a transcription factor, influencing the expression of genes involved in cellular differentiation and development. Nuclear localization of COUP-TFII enables interaction with specific DNA response elements, thereby modulating target gene transcription. COUP-TFII has been shown to interact with other transcription factors, such as retinoic acid receptors and peroxisome proliferator-activated receptors, which underscores COUP-TFII′s importance in coordinating complex gene regulatory networks.