Representative immunohistochemical images further confirmed that the protein expression levels of ACADS, ARMCX1, ETFDH, HIBADH, IMMP2L, NIPSNAP3B, and OXCT1 were significantly downregulated in BC tissue, whereas GSR, SDSL, SFXN1, and SFXN2 were upregulated. This evidence concerns the gene SFXN1 and breast cancer.