The RPN1 gene (0 pseudogenes, 1 transcript isoform), which was previously suggested by us for normalization of qPCR data in LUAD, LUSC, KIRC, KIRP, and COAD (Krasnov et al., 2011; Fedorova et al., 2015), demonstrate stable expression in these cancer types as well as in PRAD, LIHC, and THCA. This evidence concerns the gene RPN1 and cancer.