tokens: The findings in the human multiple myeloma cell lines represent the first examples of B cells with downregulated PU . 1 expression and apparently contradict observations in the murine system in which PU . 1 is expressed and active in plasmacytoma cell lines .
folded_tokens: the findings in the human multiple myeloma cell lines represent the first examples of b cells with downregulated pu . 1 expression and apparently contradict observations in the murine system in which pu . 1 is expressed and active in plasmacytoma cell lines .
labels: O O O O B-cell_line B-cell_line I-cell_line I-cell_line I-cell_line O O O O O B-cell_type I-cell_type O B-other_name B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O B-other_name I-other_name O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O B-cell_line I-cell_line I-cell_line O