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Although removal of the first 67 amino acids of p95vav activates its transforming potential in NIH 3T3 cells , this region appears to be required for its function in T cells .
 ( cell type: T cells, None) , ( protein: p95vav, None) , ( cell line: NIH 3T3 cells, None) , ( protein: first 67 amino acids, 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:
 ( cell type: T cells, None) , ( protein: p95vav, None) , ( cell line: NIH 3T3 cells, None) , ( protein: first 67 amino acids, None) 