tokens: Sequence analysis of nineteen LTRs cloned from 2 adult and 3 pediatric patients revealed an average of 33 nucleotide changes ( with respect to the sequence of the LAI LTR ) within the 455-bp U3 region .
folded_tokens: sequence analysis of nineteen ltrs cloned from 2 adult and 3 pediatric patients revealed an average of 33 nucleotide changes ( with respect to the sequence of the lai ltr ) within the 455-bp u3 region .
labels: B-other_name I-other_name O O B-DNA_domain_or_region O O O O O O O B-multi_cell O O O O B-other_name B-nucleotide O O O O O O O O O B-DNA_domain_or_region B-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O