Flow cytometric analysis of ACE2 was done with ACE2 transfected 293 cells. The cells were stained with the primary antibody (E8ER1902-40, 1/50) (red). After incubation of the primary antibody at room temperature for an hour, the cells were stained with a Alexa Fluor 488-conjugated Goat anti-Rabbit IgG Secondary antibody at 1/1000 dilution for 30 minutes.Unlabeled sample was used as a control (cells without incubation with primary antibody; green).