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Norovirus VP1 and VP2 expression increases when both capsid proteins are present. Western blots of 293 cell lysates transfected with only VP1, VP2, or both VP1 and VP2 were analyzed with rabbit antisera specific for the protein as indicated to the left of each panel. HoV VP2 contained a 3× FLAG epitope and monoclonal anti-FLAG antibody was used for detection. β-Actin served as a loading control.
