Notably, treatment of A549 cells with siRNAs that target BRD9 or GLTSCR1, but not BRD7 or ARID2, led to a reproducible (although not statistically significant) reduction in the ability of IFN‐α2 to fully protect cells from infection with the IFN‐sensitive vesicular stomatitis virus (VSV) (Fig EV1C). Here, IFNA1 is linked to infection.