THP-1 (a), (b) and U937 (c) cells were either differentiated with for 48 h (a) or induced to undergo apoptosis with camptothecin for 24 h (b), (c). Cells are labeled with Alexa-488-Plg or anti-Plg-Rs antibodies against H2B, α-enolase, annexin A2, and p11 followed by Alexa-488-ant-rabbit IgG (c) and analyzed by FACS. Early apoptotic populations are used to analyze the data. Data are of two to three independent experiments and presented as the fold change relative to untreated THP-1 or U937 cells.
