We sorted A549 and H1975 human LUAD cells using an antibody against SIRPγ, labeled the cells with GFP, and assessed the rate of their phagocytosis by RFP-labeled human bone marrow–derived macrophages (BMDMs) by flow cytometry, using the simultaneous presence of green and red labels to identify macrophages that had taken up a cancer cell. Here, SIRPG is linked to cancer.