9923
Interestingly, co-immunoprecipitation analysis also revealed that Tax mutant IEXC29S is unable to interact with NGFI-A/Egr-1 , whereas Tax mutant IEXL320G is able to interact with NGFI-A/Egr-1 .
 ( protein: NGFI-A/Egr-1, None) , ( protein: IEXC29S, None) , ( protein: Tax, None) , ( protein: Tax, None) , ( protein: NGFI-A/Egr-1, None) , ( protein: IEXL320G, 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: NGFI-A/Egr-1, None) , ( protein: IEXC29S, None) , ( protein: Tax, None) , ( protein: Tax, None) , ( protein: NGFI-A/Egr-1, None) , ( protein: IEXL320G, None) 