Interleukin-33 is biologically active independently of caspase-1 cleavage. [2009] Title Interleukin-33 is biologically active independently of caspase-1 cleavage.J. Biol. Chem. 284, 19420-19426. Author Dominique Talabot-Ayer, Celine Lamacchia, Cem Gabay, and Gaby Palmer Related Products and Services PUREfrex®