Figure 3

Protein expression of ACE2 by Immunohistochemistry (IHC). (a-c) Representative images of IHC staining of tissue sections from three organ donors showing no or few ACE2-expressing cells. (d-e) Representative images from three HF patients showing ACE2-expressing cells. (g) Measurement of mean pixel intensity show that heart failure group had a significant higher ACE2 staining intensity compared to the donor group (p = 0.035).