Figure 2From: Retroviral expression of a kinase-defective IGF-I receptor suppresses growth and causes apoptosis of CHO and U87 cells in-vivoStaining of CHO cell tumors. Left panels: hematoxylin-eosin staining of sections of CHO (panel A), CHO-WT (panel B), and CHO-MK (panel C) tumors. Right panels: TUNEL staining for apoptotic cells. Apoptotic cells were detected with a fluorescein labeled secondary antibody and show green fluorescence.Back to article page