HT1080 cells were obtained from ATCC and maintained in Dulbecco’s modified Eagle’s medium (DMEM) (catalog number 11995065; Thermo Fisher) with 10% fetal calf serum (FCS) (catalog number F8067-500ML; Sigma) and gentamicin (catalog number 15710064; Thermo Fisher). An IFN-α (catalog number 11200-2; PBL Assay Science)-sensitive HT1080 single-cell clone was derived by limiting dilution. BHK21 cells obtained from ATCC were maintained in Eagle’s minimum essential medium (EMEM) (catalog number 30-2003; ATCC) supplemented with 10% FCS (catalog number F8067-500ML; Sigma) and gentamicin (catalog number 15710064; Thermo Fisher). Cells were not tested for mycoplasma contamination but were periodically tested for retrovirus contamination using a PCR-based reverse transcriptase assay (35 (link), 36 (link)).
BSRT7 cells (a kind gift from K. Conzelmann) (37 (link)) and African green monkey kidney Vero cells (CCL-81; ATCC) were maintained in DMEM (catalog number 10-013-CV; Corning, Inc.) containing 10% fetal bovine serum (FBS) (catalog number TCB 101; Tissue Culture Biologicals) at 37°C and 5% CO2.
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