FIG. 4.

Cell surface expression of K^k is unaffected by infection with PRV vaccine strain Bartha. L929 cells were infected for 16 h with PRV strain Becker (A to C) or Bartha and then stained for FACS analysis by using antibodies against D^k (A and D), K^k (B and E; monoclonal antibody 16-3-1N), or gB (C and F). Lines: dotted, anti-mouse antibody alone; light, mock infected cells; dark, infected cells.