ACTA1 and pulmonary fibrosis: We found that α‐SMA+ (red) p21+(pink) senescent myofibroblasts expressed high levels of BAX (green) in lung fibrosis tissue (Figure 3g), but BAX6A7 (green) was almost absent in α‐SMA+(red) p21+(pink) senescent myofibroblasts (Figure 3h).