Transcriptional activator that regulates the tissue specific expression of multiple genes, especially in pancreas and liver (By similarity). Binds to the hepatocyte specific promoter element HP1. Binds to the inverted palindrome 5'-GTTAATNATTAAC-3'. Binds DNA as dimer. Forms a homodimer or heterodimer with HNF1-alpha-A. Potentially also form a heterodimer with HNF1-beta. Liver. Belongs to the HNF1 homeobox family.