6245
Instead, the BCS stimulated transcription by counteracting 5' negative regulatory DNA sequences that block the activity of the B29 minimal promoter in its absence.
 ( DNA: BCS, None) , ( DNA: minimal promoter, None) , ( protein: B29, None) , ( DNA: 5#$%# negative regulatory DNA sequences, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: BCS, None) , ( DNA: minimal promoter, None) , ( protein: B29, None) , ( DNA: 5#$%# negative regulatory DNA sequences, None) 