NFIL3 is a symbol for the gene, Nuclear factor, interleukin 3 regulated, in humans. Other names include: Nuclear factor interleukin-3-regulated protein; E4 promoter-binding protein 4; Interleukin-3 promoter transcriptional activator; Interleukin-3-binding protein 1; Transcriptional activator NF-IL3A; E4BP4; IL3BP1; NF-IL3A; NFIL3A. The encoded protein has an amino acid length of 462 and a mass of 51.5 kDa. Other isoforms may exist. NFIL3 is a member of the BZIP family, NFIL3 subfamily. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.