Although SELENOP expression levels did not differ (P = 0.263) between MSS and MSI-H cancers in this particular data set (27) (Figure 2A and Figure 2D), SELENOP expression was greater in mismatch repair–proficient (MMR-proficient) than MMR-deficient cancers in another scRNA-Seq data set (30) (Figure 2D), and this correlated with the proportion of stem-like cells present in each cancer type. The gene discussed is SELENOP; the disease is cancer.