1403
We have demonstrated that the monocyte-specific expression of the CSF-1 receptor is regulated at the level of transcription by a tissue-specific promoter whose activity is stimulated by the monocyte/B-cell-specific transcription factor PU.1 (D.-E.Zhang, C.J.Hetherington, H.-M.Chen, and D.G.Tenen, Mol.Cell. Biol.14:373-381, 1994).
 ( protein: PU.1, None) , ( protein: CSF-1, None) , ( protein: monocyte/B-cell-specific transcription factor, None) , ( DNA: tissue-specific promoter, None) , ( protein: CSF-1 receptor, 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: CSF-1, None) , ( protein: monocyte/B-cell-specific transcription factor, None) , ( DNA: tissue-specific promoter, None) , ( protein: CSF-1 receptor, None) 