CD278 is an alias for the gene, Inducible T-cell co-stimulator, in humans. Other names include: Inducible T-cell costimulator; Activation-inducible lymphocyte immunomediatory molecule; CD antigen CD278; AILIM; CVID1. The encoded protein has an amino acid length of 199 and a mass of 22.6 kDa. Other isoforms may exist. This gene shares homology with other species, including: Rat, Chicken.