13083
Co-transfections with expression plasmids for Sp1 and AP-2 further emphasized the important role of these transcription factors in both basal and PMA -enhanced LAL expression .
 ( protein: Sp1, None) , ( protein: LAL, None) , ( DNA: expression plasmids, None) , ( protein: AP-2, None) , ( protein: transcription factors, 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: Sp1, None) , ( protein: LAL, None) , ( DNA: expression plasmids, None) , ( protein: AP-2, None) , ( protein: transcription factors, None) 