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GTEx Multi Gene Query Map showing the co-expression of of ACE2, TMPRSS2, CTSL and peripheral ORs in normal tissues. Relitively high co-expression of ORs in relation to ACE2, TMPRSS2 and CTSL is documented in the colon, testis and thyroid. CTSL is vastly expressed throughout the full range of these tissues. ACE2, angiotensin-converting enzyme 2; TMPRSS2, transmembrane protease serine 2; CTSL, cathepsin L; ORs, olfactory receptors.
