PU . 1 ( spi-1 ) , a member of the Ets transcription factor family , is predominantly expressed in myeloid and B cells , activates many B cell and myeloid genes , and is critical for development of both of these lineages .
pu . 1 ( spi-1 ) , a member of the ets transcription factor family , is predominantly expressed in myeloid and b cells , activates many b cell and myeloid genes , and is critical for development of both of these lineages .
B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O O O O B-protein_family_or_group I-protein_family_or_group I-protein_family_or_group I-protein_family_or_group O O O O O O O O O O O O O O O O O O O O O O O O O O O O O