title: Survival of the fitters.
mesh_terms: D000818:Animals; D017951:Antigen Presentation; D003546:Cysteine Endopeptidases / Q000378:metabolism; D004721:Endoplasmic Reticulum / Q000201:enzymology* / Q000378:metabolism; D015395:Histocompatibility Antigens Class I / Q000378:metabolism*; D006801:Humans; D007107:Immune System / Q000502:physiology; D007931:Leucyl Aminopeptidase / Q000378:metabolism*; D051379:Mice; D009097:Multienzyme Complexes / Q000378:metabolism; D046988:Proteasome Endopeptidase Complex
chemical_list: D015395:Histocompatibility Antigens Class I; D009097:Multienzyme Complexes; D007931:Leucyl Aminopeptidase; C456799:puromycin-insensitive leucyl-specific aminopeptidase; D003546:Cysteine Endopeptidases; D046988:Proteasome Endopeptidase Complex