1787
Three additional smaller regions show homology to the ELK-1 and SAP-1 genes, a subgroup of the ets gene family that interacts with the serum response factor .
 ( protein: SAP-1, None) , ( DNA: ets gene family, None) , ( protein: serum response factor, 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: SAP-1, None) , ( DNA: ets gene family, None) , ( protein: serum response factor, None) 