Caspase 4 is a human gene encoded by the symbol, CASP4. It may also be known as: Caspase-4; CASP-4; ICE(rel)-II; Protease ICH-2; Protease TX; ICE(rel)II; ICEREL-II; ICH-2; Mih1/TX; caspase 4, apoptosis-related cysteine peptidase. The encoded protein is an enzyme with an amino acid length of 377 and a mass of 43.6 kDa. Other isoforms may exist. Caspase 4 is a member of the Peptidase C14A family. Homologs of this gene exist in other organisms, including: Mouse, Fly, Rat, Frog.