tokens: Northern blot analysis of poly ( A ) RNA purified from the human B cell line RPMI 8226 and from activated T cells revealed a major mRNA transcript of 2 . 2 kilobases .
folded_tokens: northern blot analysis of poly ( a ) rna purified from the human b cell line rpmi 8226 and from activated t cells revealed a major mrna transcript of 2 . 2 kilobases .
labels: B-other_name I-other_name I-other_name O B-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group I-RNA_family_or_group O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O B-cell_type I-cell_type I-cell_type O O B-RNA_molecule I-RNA_molecule I-RNA_molecule O B-polynucleotide I-polynucleotide I-polynucleotide I-polynucleotide O