Fig. 2From: Topoisomerase I copy number alterations as biomarker for irinotecan efficacy in metastatic colorectal cancerDistribution of TOP1, CEN-20 and CEN-2 copy numbers and of TOP1/CEN-20 and TOP1/CEN-2 ratios. Distribution in colorectal cancer samples determined by FISH. a Showing the distribution of the copy numbers for probe-mix TOP1/CEN-20. b Showing the distribution of the copy numbers for probe-mix TOP1/CEN-2Back to article page