HNF-6/ONECUT1: ProductsHNF-6 (also ONECUT1; one "cut" domain family member 1; OC-1) is a monomeric 53-56 kDa member of the One Cut-domain containing class of homeodomain proteins. It is expressed in embryonic hepatic and pancreatic islet anlage, plus adult hepatocytes and intestinal epithelial cells. HNF-6 is a transcriptional activator that is known to interact with Foxa2. Genes regulated by HNF-6 include Glut2, alpha1AT, alpha-fetoprotein and HNF-3 beta. Human HNF-6 is 465 amino acids (aa) in length. It contains two DNA-binding regions, one classified as a CUT domain (aa 283-369) and another as a homeobox domain (aa 385-444). HNF-6 is both acetylated and phosphorylated, contributing to protein stability and transactivation activity. Over aa 139-283, human HNF 6 shares 99% aa identity with mouse HNF-6. Rat HNF-6 shows a 26 aa insertion after Ala368. Given an overall aa identity of 99% between rat and human, the possibility exists that this insertion may also exist in human.