7205
Members of the recently discovered SOCS/CIS/SSI family have been proposed as regulators of cytokine signaling , and while targets and mechanisms have been suggested for some family members, the precise role of these proteins remains to be defined.
 ( protein: cytokine, None) , ( protein: SOCS/CIS/SSI 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:
 ( protein: cytokine, None) , ( protein: SOCS/CIS/SSI family, None) 