ACE2 and infection: Additionally, structural analysis suggests that the 2019-nCoV cellular receptor in humans, angiotensin converting enzyme 2 (ACE2)/B0AT1 complex can bind two S-protein at the same time, providing important inspiration for recognition and infection with coronaviruses of the subgenus Sarbecovirus (genus Betacoronavirus) (Zhou et al., 2020b).