ANXA5 and neoplasm: To further characterize the link between the AR and resistance to NK cell-mediated death, individual cell-cell conjugates were analyzed using imaging flow cytometry after tumor cells were labeled with the live/dead cell discrimination marker Zombie Red and Annexin V. Early apoptotic cells were characterized as Annexin V+/Zombie Red-, late apoptotic cells as Annexin V+/Zombie Red+, and Annexin V-/Zombie Red+ cells were classified as necrotic for quantitative analysis.