 ACE2 is a protein expressed in many different cell types, including enterocytes, renal tubules, gallbladder, cardiomyocytes, male reproductive cells, placental trophoblasts, ductal cells, eye, and vasculature. However, it is not expressed in the majority of cells in the respiratory system, suggesting that this protein may play a role in the pathogenesis of SARS-CoV-2 infections. This information can be used to better understand how the virus enters cells and how it spreads throughout the body. Additionally, this knowledge could help researchers develop more effective treatments for the virus.