细菌入侵后抗原呈递的基本种类和过程 Peptide antigen Lipid antigen Peptide antigen Class I MHC CDI Class II MHC Peptides Endocytic compartments Rough endoplasmic reticulum TAP Bactcria Lipids Peptides Intracellular bacteria Endosome 细菌入侵后抗原呈递的基本种类和过程