More extensive deletion of sequences upstream of Cp , including the EBNA2-dependent enhancer , resulted in nearly complete loss of Cp activity .
more extensive deletion of sequences upstream of cp , including the ebna2-dependent enhancer , resulted in nearly complete loss of cp activity .
O O O O O O O B-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O B-DNA_domain_or_region O O