Atg4 proteases cleave and prime for conjugation LC3/Atg8. The four members of the family are listed with aliases in parentheses, full name and link to gene report pages:
Atg4a – (LOC678769, similar to Cysteine protease ATG4A) – autophagy related 4A, cysteine peptidase
Atg4b (APG4B, AUTL1) – autophagy related 4B, cysteine peptidase
Atg4c (APG4C, AUTL3) – autophagy related 4C, cysteine peptidase
Atg4d (APG4D, AUTL4) – autophagy related 4D, cysteine peptidase