TRIM28 and infection: We reanalyzed our IAV-infected transcriptome datasets to allow mapping of repetitive sequences, and found that IAV infection (similar to expression of SUMOylation-deficient TRIM28) led to up-regulation of many cellular TEs (Fig. 5 D and E and Dataset S7), although it is notable that some TEs from the same subfamilies are also suppressed during infection (Fig. 5F).