This gene is a proto-oncogene candidate. It is identified by its translocation into the immunoglobulin alpha-locus in some cases of B-cell leukemia. The protein encoded by this gene contains seven ankyrin repeats, which are most closely related to those found in I kappa B proteins. This protein functions as a transcriptional co-activator that activates through its association with NF-kappa B homodimers. The expression of this gene can be induced by NF-kappa B, which forms a part of the autoregulatory loop that controls the nuclear residence of p50 NF-kappa B.,BCL3,BCL4,D19S37,Epigenetics & Nuclear Signaling,Transcription Factors,Cancer,Cell Biology & Developmental Biology,Apoptosis,Immunology & Inflammation,NF-kB Signaling Pathway,BCL3