Blue color represents normal breast tissues (n=114) and red color represents primary breast cancer tissues (n=1097). FN1 (A), SEMA3F (B), DDR2 (C), BGN (D), COL5A2 (E), EFNA3 (F), RHOQ (G), NRP1 (H), SEMA3A (I); mrDEGs, mitochondria-related differential expressed genes; TCGA, The Cancer Genome Atlas, https://www.cancer.gov/tcga.