LAMP1 and breast cancer: Breast cancer cells lacking STARD7 also showed elevated levels of LAMP1 or LAMP2, which, together with flow cytometry analyses using Lysotracker, demonstrates that STARD7 deficiency in both MCF7 and MDA‐MB231 but not in T47D cells led to an increased in lysosomal biomass, a hallmark of autophagy (Figure 10C).