During cross-presentation. exogenous antigens (i. e. intracellular pathogens or tumor cells) are internalized and processed within the endocytic system and also by the proteasome in the cytosol. https://www.diegojavierfares.com/hot-super-Gauge-Pillar-Pod-Suits-Mitsubishi-Triton-MN-With-Curtain-SRS-2009-2015-SGP3101-flash-find/