Consistent with these protein levels, RT-qPCR results indicated a 5.04- and 10.70-fold increase in the levels of mRNA encoded by the ALV-A viral genome in MARCH2KO cells compared to those in WT cells at 48 and 120 h post-infection, respectively, and this promoting effect was abolished when MARCH2 was re-expressed in MARCH2KO cells (Fig. 2I). This evidence concerns the gene MARCHF2 and infection.