Among the 33 cancer types in the TCGA database (abbreviations, see Supplementary Table 5), MAEL was expressed higher in TGCT, glioblastoma multiforme (GBM), brain lower-grade glioma (LGG), kidney renal papillary cell carcinoma (KIRP, also abbreviated as pRCC), and KIRC (also abbreviated as ccRCC; Figure 2A). Here, MAEL is linked to nonpapillary renal cell carcinoma.