7667
We propose a model in which stimulation of monocytes by IFN activates de novo synthesis of an inhibitory factor , possibly one or more members of the SOCS/ SSI/CIS gene family , capable of suppressing activation of STAT6 by IL-4 and IL-13 .
 ( cell type: monocytes, None) , ( protein: IL-13, None) , ( protein: STAT6, None) , ( protein: IFN, None) , ( protein: IL-4, None) , ( protein: inhibitory factor, None) , ( protein: SOCS/ SSI/CIS gene family, 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:
 ( cell type: monocytes, None) , ( protein: IL-13, None) , ( protein: STAT6, None) , ( protein: IFN, None) , ( protein: IL-4, None) , ( protein: inhibitory factor, None) , ( protein: SOCS/ SSI/CIS gene family, None) 