Amplification of EPOR in amplicons <10 Mb was identified in less than 0.7% of tumours (n=8) and was similar to the frequency of amplification of other established non-oncogenic loci such as glyceraldehyde-3-phosphate dehydrogenase (GAPDH), β-actin (ACTB), and β-glucuronidase (GUSB) (Figure 2A). This evidence concerns the gene GUSB and neoplasm.