DNA sequence homology of E1A genes between different Ad groups ( group A , Ad12 ; group C , Ad5 ) is limited almost entirely to three conserved regions located within the first exon of E1A .
dna sequence homology of e1a genes between different ad groups ( group a , ad12 ; group c , ad5 ) is limited almost entirely to three conserved regions located within the first exon of e1a .
O O O O B-DNA_domain_or_region O O O O O O B-virus I-virus O B-virus O B-virus I-virus O B-virus O O O O O O O O O O O O O O O B-DNA_domain_or_region O