Class II transactivator is an alias for the gene, Class II, major histocompatibility complex, transactivator, in humans. Other names include: MHC class II transactivator; NLR family, acid domain containing; nucleotide-binding oligomerization domain, leucine rich repeat and acid domain containing; C2TA; CIITAIV; MHC2TA; NLRA. The encoded protein is an enzyme with an amino acid length of 1130 and a mass of 123.5 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.