IL-1 alpha (IL-1α, IL-1F1) is a member of the interleukin 1 family of cytokines. IL-1 alpha is an inflammatory cytokine active in the initiation of the inflammatory reaction and in driving Th1 and Th17 inflammatory responses. Feline IL-1 alpha Recombinant Protein is purified interleukin-1 alpha cytokine produced in yeast.