4818
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.
 ( protein: spi-1, None) , ( protein: PU.1, None) , ( protein: Ets transcription factor family, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: spi-1, None) , ( protein: PU.1, None) , ( protein: Ets transcription factor family, None) 