2699
The transcription factors Sp1 and PU.1 prime the CD11b promoter , but the nature of the factors responsible for its inducible expression are unknown.
 ( protein: CD11b, None) , ( protein: transcription factors, None) , ( protein: PU.1 prime, None) , ( DNA: CD11b promoter, None) , ( protein: Sp1, 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: CD11b, None) , ( protein: transcription factors, None) , ( protein: PU.1 prime, None) , ( DNA: CD11b promoter, None) , ( protein: Sp1, None) 