During latent Epstein-Barr virus ( EBV ) infection of human B lymphocytes , six viral nuclear antigen ( EBNAs ) are expressed from long primary transcripts by means of alternative splicing and alternative polyadenylylation sites .
during latent epstein-barr virus ( ebv ) infection of human b lymphocytes , six viral nuclear antigen ( ebnas ) are expressed from long primary transcripts by means of alternative splicing and alternative polyadenylylation sites .
O O B-virus I-virus O B-virus O O O B-cell_type I-cell_type I-cell_type O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O B-protein_family_or_group O O O O B-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group O O O B-RNA_domain_or_region I-RNA_domain_or_region O B-RNA_domain_or_region I-RNA_domain_or_region I-RNA_domain_or_region O