tokens: A 21 . 4-kb DNA clone , pZVB70 , showed the highest transactivating ability , while two other DNA fragments , pZVB10 ( 6 . 2 kb ) and pZVH14 ( 8 . 7 kb ) , showed lower activity .
folded_tokens: a 21 . 4-kb dna clone , pzvb70 , showed the highest transactivating ability , while two other dna fragments , pzvb10 ( 6 . 2 kb ) and pzvh14 ( 8 . 7 kb ) , showed lower activity .
labels: O B-DNA_molecule I-DNA_molecule I-DNA_molecule I-DNA_molecule I-DNA_molecule O B-DNA_molecule O O O O B-other_name I-other_name O O O O B-DNA_molecule I-DNA_molecule O B-DNA_molecule O O O O O O O B-DNA_molecule O O O O O O O O O O O