12916
In vitro studies identify three essential elements of the TATA-less blr1 core promoter that confer cell type- and differentiation- specific expression in the B cells of both humans and mice , a functional promoter region (-36 with respect to the transcription start site ), a NF-kappaB motif (+44), and a noncanonical octamer motif (+157).
 ( cell type: B cells, None) , ( DNA: transcription start site, None) , ( protein: NF-kappaB, None) , ( DNA: functional promoter region, None) , ( DNA: TATA-less blr1 core promoter, None) , ( DNA: NF-kappaB motif, None) , ( DNA: noncanonical octamer motif, 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:
 ( cell type: B cells, None) , ( DNA: transcription start site, None) , ( protein: NF-kappaB, None) , ( DNA: functional promoter region, None) , ( DNA: TATA-less blr1 core promoter, None) , ( DNA: NF-kappaB motif, None) , ( DNA: noncanonical octamer motif, None) 