4059
Spi-B and PU.1 are hematopoietic-specific transcription factors that constitute a subfamily of the Ets family of DNA-binding proteins .
 ( protein: Ets family, None) , ( protein: DNA-binding proteins, None) , ( protein: Spi-B, None) , ( protein: hematopoietic-specific transcription factors, None) , ( protein: PU.1, 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: Ets family, None) , ( protein: DNA-binding proteins, None) , ( protein: Spi-B, None) , ( protein: hematopoietic-specific transcription factors, None) , ( protein: PU.1, None) 