716
Therefore, although PU.1 and Spi-B may bind to similar DNA control elements and have redundancy of transactivation function in vitro, the lack of significant levels of Spi-B in myeloid cells makes it unlikely that Spi-B plays a significant role in myeloid lineage development and gene expression .
 ( protein: PU.1, None) , ( protein: Spi-B, None) , ( protein: Spi-B, None) , ( protein: Spi-B, None) , ( cell type: myeloid cells, 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: PU.1, None) , ( protein: Spi-B, None) , ( protein: Spi-B, None) , ( protein: Spi-B, None) , ( cell type: myeloid cells, None) 