Viral DNA synthesis and late gene expression were found to be defective in U937 cells infected with E1B 19K mutants compared with wild-type virus .
viral dna synthesis and late gene expression were found to be defective in u937 cells infected with e1b 19k mutants compared with wild-type virus .
B-other_name I-other_name I-other_name O B-other_name I-other_name I-other_name O O O O O O B-cell_line I-cell_line O O B-protein_molecule I-protein_molecule O O O B-virus I-virus O