To confirm this possibility, we detected a kinetic analysis of RTA phosphorylation status at different time points during de novo infection in both SLK-Vector and SLK-PPP2R1A cells, which demonstrated that the phosphorylation of RTA shows less signals in SLK-PPP2R1A cells than that in SLK-Vector cells (S6E Fig). Here, PPP2R1A is linked to infection.