A number of ELISA Kits are available that target Autophagy-related 4B, an alias of the protein, autophagy related 4B cysteine peptidase. The human protein, encoded by the gene ATG4B, is an enzyme and member of the Peptidase C54 family. The protein's cellular localization is indicated to be cytoplasmic. Additional synonyms or past names for this protein may include: APG4B, AUTL1. Homology is conserved in other species, such as Mouse, Rat, Zebrafish, Frog.