The average mammosphere forming efficiency (MFE) of ALDH+ cells from BC-P007, BC-P107 and BC-P515 was 19 ± 2.0/1,000 cells as compared to 1.9 ± 0.5/1,000 cells for ALDH- cells (P <0.0001) (Figure 3D). This evidence concerns the gene LDHA and breast cancer.