Expression of ENO1 in neuroblastoma cell lines and primary neuroblastoma tumours using real-time-PCR. Relative concentrations of ENO1-mRNA in relation to the concentration of the housekeeping gene GUSB for each sample are indicated on the y-axis. The samples are grouped into five groups: neuroblastoma cell lines, with and without 1p-deletion; stage 2 tumours; stage 4 tumours, with and without 1p-deletion. The 1p-deletion-status of each sample is indicated at the bottom. For each group the average value is indicated by a dotted line. A difference in expression could be detected between stage 2 tumours and stage 4 tumours (p = 0.01). No difference in expression could be detected between 1p-deleted samples and not 1p-deleted samples.