13656
Gel mobility shift assays demonstrated that specific DNA-protein complexes can be formed with each element, and that there are cell-specific differences in factors, which bind to the SP-1 -like element between MEL and NIH3T3 cells .
 ( DNA: SP-1 -like element, None) , ( protein: DNA-protein complexes, None) , ( protein: SP-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:
 ( DNA: SP-1 -like element, None) , ( protein: DNA-protein complexes, None) , ( protein: SP-1, None) 