13734
We found very little detectable activation of AP-1 , as assessed in a gel shift assay , in alveolar macrophages , whereas monocytes showed a substantial activation of AP-1 by PMA .
 ( cell type: alveolar macrophages, None) , ( cell type: monocytes, None) , ( protein: AP-1, None) , ( protein: AP-1, 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: alveolar macrophages, None) , ( cell type: monocytes, None) , ( protein: AP-1, None) , ( protein: AP-1, None) 