Phylogenetic tree describing the relationships between the MCF-7 sublines. The root was arbitrarily defined as corresponding to a genome devoid of any CNA (normal genome). The doxorubicin resistant line was also included in the analysis. Since it did not belong to the MCF-7 group it qualified as a potential outgroup and was indeed positioned as such by the analysis. This tree is a consensus tree corresponding to the 3 most parsimonious trees identified. It is 711 mutations long. Values represented at the nodes correspond to bootstrap percentages (top) and Bremer support indices (bottom). These values measure the robustness of the nodes.