Both MAGT1 -TUSC3cells and STT3Bcells were then infected with the rLCMV/LASV GPC virus, and we observed the same hypoglycosylation pattern of viral GP in the two cells compared to the glycosylation pattern in WT cells (Fig. 7C) , indicating that MAGT1 Journal of Virology or TUSC3 was required for full viral GP glycosylation.