epstein-barr virus ( ebv ) nonproducer cells nc37 induced to viral early antigen ( ea ) synthesis by the tumor promotor 12-o-tetradecanoylphorbol-13-acetate ( tpa ) were labeled at day 4 after induction with 32p , and were analyzed by immunoprecipitation with human ea-positive sera .
C0003342
viral
C0003320
ea