Interleukin 11, or, IL11, is a human gene. Other names include: Interleukin-11; IL-11; Adipogenesis inhibitory factor; AGIF; Oprelvekin. The encoded protein has an amino acid length of 199 and a mass of 21.4 kDa. Other isoforms may exist. Interleukin 11 is a member of the IL-6 superfamily. This gene shares homology with other species, including: Mouse, Rat, Frog, Chicken.