Transmission electron micrographs of DEK-CAN peptide-loaded autologous LCL cocultured with HO-1. (A) A target cell, which is in contact with a CTL (arrow). Note the degeneration of the mitochondria in the target cell. (B) A target cell, which was lysed by HO-1 cells. Note the degeneration of the mitochondria and rough endoplasmic reticula in the target cell. Original magnification: (A), ×6,300; (B), ×7,200.