Background:
NF-kappa-B is a ubiquitous transcription factor involved in several biological processes. It is held in the cytoplasm in an inactive state by specific inhibitors. Upon degradation of the inhibitor,NF-kappa-B moves to the nucleus and activates transcription of specific genes. NF-kappa-B is composed of NFKB1 or NFKB2 bound to either REL,RELA,or RELB. The most abundant form of NF-kappa-B is NFKB1 complexed with the product of this gene,RELA. Four transcript variants encoding different isoforms have been found for this gene.