Tcf virus infection of Isreco1, Co115, and HeLa cells. (A) Western blots done at 24 h postinfection showing expression of NS1 in the colon cancer cell lines Isreco1 and Co115 (upper and middle panels, respectively) and in HeLa cells (lower panel). (B) Burst assays in Isreco1, Co115, and HeLa cells measuring virus production at 48 h postinfection. The values are normalized to the phH1 results.