MKI67 and acute kidney injury: In addition, we also identified a subset of “proliferative Mac” (cluster 5), characterized by high expression of cell‐cycle‐related genes (Mki67, Top2a, Pcna, Nusap1) (Figure 3a,c; Figure S3a, Supporting Information), which might represent the proliferative states of macrophages for replenishment after AKI.