tokens: These cDNA were 2343 bp long and their transcription initiation site was located 814 bp upstream from the J delta 1 segment .
folded_tokens: these cdna were 2343 bp long and their transcription initiation site was located 814 bp upstream from the j delta 1 segment .
labels: O O O B-polynucleotide I-polynucleotide O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O