The protein expression levels of ACE2 in BRCA (UALCAN). (A) ACE2 protein expression in normal or breast cancer patients. (B) ACE2 protein expression in normal individuals or stage 1, 2, or 3 breast cancer patients. (C) ACE2 protein expression in normal individuals of any race or breast cancer patients of Caucasian, African‐American, or Asian race. (D) ACE2 protein expression in normal individuals at any age or breast cancer patients aged 21–40, 41–60, 61–80, or 81–100 years. (E) ACE2 protein expression in normal individuals or Luminal, HER2 positive, or Triple‐negative breast cancer (TNBC) patients. (F) ACE2 protein expression in normal individuals or patients with IDC, ILC, Mixed histology, Mucinous Carcinoma, Medullary Carcinoma, or other types of breast cancer. (G) ACE2 protein expression in normal individuals or breast cancer patients with pan‐cancer subtypes of cancer (K1 to K10). (*p < 0.05, **p < 0.01, ***p < 0.001)