This family consists of the N terminus of homeobox-containing transcription factor HNF-1. This region contains a dimerisation sequence [1] and an acidic region that may be involved in transcription activation. Mutations and the common Ala/Val 98 polymorphism in HNF-1 cause the type 3 form of maturity-onset diabetes of the young (MODY3) [2].

1: 1H resonance assignment and secondary structure determination of the dimerization domain of transcription factor LFB1. Pastore A, De Francesco R, Barbato G, Castiglione Morelli MA, Motta A, Cortese R; Biochemistry 1991;30:148-153. PMID:1988016

2: A prevalent amino acid polymorphism at codon 98 in the hepatocyte nuclear factor-1alpha gene is associated with reduced serum C-peptide and insulin responses to an oral glucose challenge. Urhammer SA, Fridberg M, Hansen T, Rasmussen SK, Moller AM, Clausen JO, Pedersen O; Diabetes 1997;46:912-916. PMID:9133564