PU . 1 expression is maintained at stable levels during differentiation of myeloid cell lines U937 and HL-60 to monocytic and neutrophilic cells .
pu . 1 expression is maintained at stable levels during differentiation of myeloid cell lines u937 and hl-60 to monocytic and neutrophilic cells .
B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O O O B-cell_line I-cell_line I-cell_line B-cell_line O B-cell_line O O O O O O