BUB1 and lung cancer: Thereafter, we measured expression of five genes commonly considered as proliferative markers, Ki67, TOPO IIa, BUB1, CENP2, FOXM1, including in lung cancers [36,37,38,39]; in the 10 NF-YA cohorts, all showed progressively decreasing levels from high-to-low NF-YA expressing tumors (Figure 3).