CSNK2A1 and cancer: The genes encoding CK2 subunits are not commonly mutated in cancer cells; CSNK2A1, CSNK2A2, and CSNK2B are mutated in around 2%, 1%, and 1%, respectively, of 10,967 patient samples from 32 studies in The Cancer Genome Atlas (TCGA; https://www.cancer.gov/tcga).