ALDH1A1 and colorectal cancer: Munro et al. (2018) summarize the current stem cell markers used to identify and localize CSC subpopulations in colorectal cancer. Based on this, we investigated the expression levels of these genes between different subgroups. The results are shown in Figure 5C; for example, CD44, CD133, and ALDH1A1 do not differ between different clusters.