IRF-2BP1 and IRF-2BP2 are nuclear transcriptional repressor proteins and can inhibit both enhancer-activated and basal transcription. They both contain N-terminal zinc finger represented in this family and C-terminal RING finger domains [1].

1: Identification of novel co-repressor molecules for Interferon Regulatory Factor-2. Childs KS, Goodbourn S; Nucleic Acids Res. 2003;31:3016-3026. PMID:12799427