13551
Transient transfection analysis with target plasmids containing either DRA promoter (wild-type or mutated) or TPA response elements demonstrated that pretreatment with the selective PKC inhibitor GF 109203X repressed TPA -mediated activation .
 ( protein: PKC, None) , ( DNA: DRA promoter, None) , ( DNA: TPA response elements, None) , ( DNA: target plasmids, 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: PKC, None) , ( DNA: DRA promoter, None) , ( DNA: TPA response elements, None) , ( DNA: target plasmids, None) 