COUP-TFI  COUP-TF1 (COUP Transcription Factor 1) also known as NR2F1 (Nuclear Receptor subfamily 2, group F, member 1) is a protein that in humans is encoded by the "NR2F1" gene. This protein is a member of nuclear hormone receptor family of steroid hormone receptors. Coup (chicken ovalbumin upstream promoter) transcription factor binds to the ovalbumin promoter and, in conjunction with another protein (S300-II) stimulates initiation of transcription. COUP-TF1 binds to both direct repeats and palindromes of the 5'-AGGTCA-3' motif. COUP-TFI has been shown to interact with:  Mutations in this gene have been associated with Bosch-Boonstra-Schaaf optic atrophy syndrome.