rITs were labeled with Alexa Fluor 647 Labeling Kit (Invitrogen) according to manufacturer’s instructions. rITs for in vivo assays were diluted in phosphate buffered saline (PBS).
Secondary antibodies were purchased from Santa Cruz (Dallas, TX), primary antibodies (MCL1, PARP, EF2, GAPDH) from Cell Signaling (Danvers, MA), flow cytometry antibodies and Annexin V-PE/7-AAD from Becton Dickinson (Franklin Lakes, NJ).