1222
This protein had an apparent molecular mass of 84 kDa and was not recognized by stat3 or stat1 mAb or antisera .
 ( protein: stat1 mAb, None) , ( protein: 84 kDa, None) , ( protein: stat3, 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: stat1 mAb, None) , ( protein: 84 kDa, None) , ( protein: stat3, None) 