11171
ATF/CREB and Sp family members interacted with the 21 bp repeats to form DNA-protein complexes common to all cell types examined.
 ( protein: ATF/CREB, None) , ( protein: DNA-protein complexes, None) , ( DNA: 21 bp repeats, None) , ( protein: Sp family members, 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: ATF/CREB, None) , ( protein: DNA-protein complexes, None) , ( DNA: 21 bp repeats, None) , ( protein: Sp family members, None) 