1F42, 1F45, 3D85, 3D87, 3DUH, 3HMX, 3QWR, 4GRW, 4OE8, 4OG9
Subunit beta of interleukin 12 (also known as IL-12B, natural killer cell stimulatory factor 2, cytotoxic lymphocyte maturation factor p40, or interleukin-12 subunit p40) is a protein that in humans is encoded by the IL12B gene. IL-12B is a common subunit of interleukin 12 and Interleukin 23.