ELISA kits for the study of the target, IL-33 are available in ready-to-use formats. The protein is also known as interleukin 33 or IL33. It is a 270-residue protein with a nuclear and secreted localization. In addition, up to 4 isoforms have been discovered. Other alias names for this target include: IL1F11, DVS27, nuclear factor from high endothelial venules, nuclear factor for high endothelial venules, interleukin-1 family member 11, and DVS27-related protein, and NFEHEV. ELISA suppliers report species reactivity to the following: human, mouse, rat, bovine, primate, guinea pig, and other mammalian.