NFkB p105, or Nuclear factor of kappa light polypeptide gene enhancer in B-cells 1, is a human gene encoded by NFKB1. It may also be known as: Nuclear factor NF-kappa-B p105 subunit; DNA-binding factor KBF1; EBP-1; KBF1; NF-kB1; NF-kappa-B; NF-kappaB; NFKB-p105; NFKB-p50; NFkappaB. The encoded protein has an amino acid length of 968 and a mass of 105.4 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Frog.