Fig. 3

Fatty acid levels and related metabolic pathways in breast cancer and corresponding normal breast tissue. a Comparison between the breast cancer tissue samples and the corresponding normal breast tissue samples (red bars: cancer > normal; blue bars: cancer < normal); b Comparison between the TN tumors and EP + H- tumors (red bars: TN > EP + H-; blue bars: TN < EP + H-); c Comparison between the TN tumors and the corresponding normal breast tissue samples (red bars: cancer > normal; blue bars: cancer < normal); d Comparison between the EP + H- tumors and the corresponding normal breast tissue samples (red bars: cancer > normal; blue bars: cancer < normal). Asterisks indicate significant differences (p < 0.05). The Wilcoxon signed rank test was used for comparisons between the pairs of breast cancer tissue samples and normal breast tissue samples, and the Mann-Whitney-U test was used for comparisons involving metabolites that were not detected in the paired samples. The scale of each bar reflects the ratio of the log2 fold values of the pairs of breast cancer tissue samples and the corresponding normal breast tissue samples. The numbers next to each bar indicate the Log2-fold values (a the breast cancer tissue samples versus the corresponding normal breast tissue samples; b TN tumors versus EP + H- tumors; c TN tumors versus the corresponding normal breast tissue samples; d EP + H- tumors versus the corresponding normal breast tissue samples)