5046
Analysis of different CREB mutants with this genetic system indicated that the C-terminal 92 amino acid residues , which include the basic domain and the leucine zipper , are necessary and sufficient to mediate transactivation by Tax .
 ( protein: CREB mutants, None) , ( protein: C-terminal 92 amino acid residues, None) , ( protein: basic domain, None) , ( protein: leucine zipper, None) , ( protein: Tax, 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: CREB mutants, None) , ( protein: C-terminal 92 amino acid residues, None) , ( protein: basic domain, None) , ( protein: leucine zipper, None) , ( protein: Tax, None) 