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Interestingly, unlike NRL in rat mammary carcinomas , no significant association between NGAL expression and HER-2/neu activation was found in human breast tumors .
 ( protein: NGAL, None) , ( protein: HER-2/neu, None) , ( protein: NRL, 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: NGAL, None) , ( protein: HER-2/neu, None) , ( protein: NRL, None) 