However , Rta by itself is less potent than ZEBRA in the ability to activate most early and late lytic cycle genes .
however , rta by itself is less potent than zebra in the ability to activate most early and late lytic cycle genes .
O O B-protein_molecule O O O O O O B-protein_molecule O O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O