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ACE2 expressions on different cancers were analysed using 3 TCGA data sets with the ULCAN database. The blue box indicates that ACE2 expression is significantly higher in normal tissue, i.e. adjacent tissue compared with breast, liver and prostate cancer tissue. ACE2, angiotensin-converting enzyme 2. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)
