MAN1B1 and infection: To demonstrate that this MAN1B1 activity is antiviral, HIV-1 luciferase-reporter pseudovirions (PVs) expressing SARS1-S, SARS2-S, and MERS-S were produced from HEK293T WT and MAN1B1-KO cells in the presence of ectopic MAN1B1, and their infectivity was determined by infection of Huh7 cells.