tokens: To study this element and its role in class II gene regulation further , a cDNA library was screened with oligonucleotide probes containing both the S element and the nearby J element of the human DPA gene .
folded_tokens: to study this element and its role in class ii gene regulation further , a cdna library was screened with oligonucleotide probes containing both the s element and the nearby j element of the human dpa gene .
labels: O O O O O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O B-DNA_family_or_group I-DNA_family_or_group O O O B-polynucleotide I-polynucleotide O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-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 O