3158
In order to further understand the transcription factors which play a role in the commitment of multipotential progenitors to the monocyte/macrophage lineage, we have initiated an investigation of the factors which activate the M-CSF receptor very early during the monocyte differentiation process .
 ( protein: M-CSF receptor, None) , ( cell type: multipotential progenitors, None) , ( protein: M-CSF, 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: M-CSF receptor, None) , ( cell type: multipotential progenitors, None) , ( protein: M-CSF, None) 