Asparagine endopeptidase is not essential for class II MHC antigen presentation but is required for processing of cathepsin L in mice.
Maehr R, Hang HC, Mintern JD, Kim YM, Cuvillier A, Nishimura M, Yamada K, Shirahama-Noda K, Hara-Nishimura I, Ploegh HL. Asparagine endopeptidase is not essential for class II MHC antigen presentation but is required for processing of cathepsin L in mice. J Immunol. 2005 Jun 01; 174(11):7066-74.