13654
Functional analysis of the promoter by transient transfection assays indicated that synergistic action between an SP-1 -like element at -21/-12, a GATA site at -59/-54, and a novel regulatory element , CPRE (- GGACTACAG -) at -49/-41, is essential for the promoter activity in murine erythroleukemia (MEL) cells .
 ( protein: SP-1, None) , ( DNA: novel regulatory element, None) , ( DNA: SP-1 -like element, None) , ( DNA: GGACTACAG, None) , ( cell type: murine erythroleukemia (MEL) cells, None) , ( DNA: GATA site, None) , ( DNA: CPRE, 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: SP-1, None) , ( DNA: novel regulatory element, None) , ( DNA: SP-1 -like element, None) , ( DNA: GGACTACAG, None) , ( cell type: murine erythroleukemia (MEL) cells, None) , ( DNA: GATA site, None) , ( DNA: CPRE, None) 