CPF, or Nuclear receptor subfamily 5 group A member 2, is a human gene encoded by NR5A2. It may also be known as: Alpha-1-fetoprotein transcription factor; B1-binding factor; hB1F; CYP7A promoter-binding factor; Hepatocytic transcription factor; Liver receptor homolog 1; liver receptor homolog-1; B1F; B1F2; FTF; FTZ-F1; FTZ-F1beta; LRH1; hB1F-2; nuclear receptor subfamily 5, group A, member 2. The encoded protein has an amino acid length of 541 and a mass of 61.3 kDa. CPF is a member of the Nuclear hormone receptor family, NR5 subfamily. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.