This family includes vertebrate transcription factors, some of which are regulated by IL-3/adenovirus E4 promoter binding protein [1]. Others were found to strongly repress transcription in a DNA-binding-site-dependent manner [2].

1: Pivotal role for the NFIL3/E4BP4 transcription factor in interleukin 3-mediated survival of pro-B lymphocytes. Ikushima S, Inukai T, Inaba T, Nimer SD, Cleveland JL, Look AT; Proc Natl Acad Sci U S A 1997;94:2609-2614. PMID:9122243

2: Transcriptional repression by a novel member of the bZIP family of transcription factors. Cowell IG, Skinner A, Hurst HC; Mol Cell Biol 1992;12:3070-3077. PMID:1620116