5186
The JAK kinases and the signal transducers and activators of transcription (STAT) factors have been found to be essential components.
 ( protein: JAK kinases, None) , ( protein: signal transducers and activators of transcription (STAT) factors, 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: JAK kinases, None) , ( protein: signal transducers and activators of transcription (STAT) factors, None) 