Fewer genes were identified than yeast colonies used for library plasmid extraction because a number of genes was identified several times in the same screen (partly with non-identical cDNA sequences; see Table 1 and Table S1), including MALAT1 from the leukemia screen (10 cDNA clones), and B2M from three screens (identified 6 times in glioblastoma, 6 times in melanoma with the HC4 strain, and 9 times in melanoma with the DSI strain). The gene discussed is B2M; the disease is glioblastoma.