14797
In addition, the macrophage transcription factor PU.1 binds the CD11b promoter in vitro and in vivo close to the Sp1 site .
 ( protein: transcription factor, None) , ( DNA: CD11b promoter, None) , ( DNA: Sp1 site, 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: transcription factor, None) , ( DNA: CD11b promoter, None) , ( DNA: Sp1 site, None) 