Figure 5. Level of the ACE2 protein studied in explanted embryonic hearts treated by HDAC inhibitors. (A) In nontreated, TSA (trichostatin A), and SAHA (suberoylanilide hydroxamic acid)-treated explanted mouse hearts at stage e15, the ACE2 protein level was analyzed. (B) Quantification of the protein levels, as assessed by western blotting, was performed using ImageJ software.