12862
In the context of a bZIP domain defective in DNA binding, mutants retaining either of the two transactivation domains of E2A were able to extend cell survival after growth factor deprivation .
 ( protein: growth factor, None) , ( protein: transactivation domains, None) , ( protein: E2A, None) , ( protein: bZIP domain, 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: growth factor, None) , ( protein: transactivation domains, None) , ( protein: E2A, None) , ( protein: bZIP domain, None) 