Preincubation of cells with 1-deoxynojirimicin and swainsonine, which block carbohydrate trimming by inhibiting glucosidase I-II and α-mannosidase II [52] also reduced MBL-mediated infection albeit to a lesser extent than tunicamycin, relative to the control in which MBL enhanced viral uptake by 18-fold (Figure 3E). This evidence concerns the gene MBL2 and infection.