Other substrates include the transcription factors Sp1, KLF5, FOXO1, MEF2C, SRY, GATA-4, and HNF-6, HMG-B2, STAT3, the androgen and estrogen (α) receptors, GATA-2, GATA-3, MyoD, E2F(1-3), p73α, retinoblastoma (Rb), NF-κB (p50, p65), Smad7, importin-α, Ku70, YAP1, E1A adenovirus protein, and S-HDAg (hepatitis delta virus small delta antigen).