Consisting of about 110 amino acids, the domain in<unk>  (see Regulation of gene expression) has four<unk> es and a two-strand beta-sheet. These proteins are classified into 19 families called FoxA-FoxS. Mutations in FoxP proteins are implicated in human autoimmune diseases.
Winged-helix transcription factors
Sp1 transcription factor
Mir-590 microRNA precursor family
Mir-618 microRNA precursor family
Mir-3180 microRNA precursor family
Mir-638 microRNA precursor family
Mir-652 microRNA precursor family
Mir-663 microRNA precursor family