By 8 hpi, the nuclei of MEFwt (Fig 4Ai), MEF-Impα1-/- (Fig 4Ci), MEF-Impα3-/- (Fig 4Di), and MEF-Impα4-/- (Fig 4Ei) contained prominent amounts of nuclear capsid proteins but no nuclear capsid proteins were detected upon infection in the presence of nocodazole (Fig 4Bi). This evidence concerns the gene BPNT2 and infection.