3617
This study thus supports the concept that utilization of distinct STAT proteins by different cytokine receptors is dependent on the expression of particular ligand-activatable, tyrosine-containing STAT docking sites in receptor intracellular domains .
 ( protein: tyrosine-containing STAT docking sites, None) , ( protein: cytokine receptors, None) , ( protein: STAT proteins, None) , ( protein: receptor intracellular domains, 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: tyrosine-containing STAT docking sites, None) , ( protein: cytokine receptors, None) , ( protein: STAT proteins, None) , ( protein: receptor intracellular domains, None) 