Quantitative RT-PCR of cDNA from cancer cells harbouring 19q12 amplification or lacking amplification of this locus revealed that UQCRFS1, POP4, CCNE1 and C19ORF2 genes were overexpressed when amplified (P < 0.05, Mann Whitney U test, Figure 1E), whereas VSTM2B, ZNF536 and TSHZ3 expression could not be detected in the majority of cell lines at the mRNA level. Here, POP4 is linked to cancer.