Interleukin 1 beta
Interleukin-1 beta (IL-1β) also known as leukocytic pyrogen, leukocytic endogenous mediator, mononuclear cell factor, lymphocyte activating factor and other names, is a pro-inflammatory cytokine protein that in humans is encoded by the IL1B gene. == Function == There are two genes for interleukin-1 (IL-1): IL-1 alpha and IL-1 beta (this gene).