5454
Addition of ubiquitin protein ligase E3 substantially enhanced the E214K -mediated ubiquitinylation of c-Jun and c-Fos .
 ( protein: c-Jun, None) , ( protein: E214K, None) , ( protein: c-Fos, None) , ( protein: ubiquitin protein ligase E3, 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: c-Jun, None) , ( protein: E214K, None) , ( protein: c-Fos, None) , ( protein: ubiquitin protein ligase E3, None) 