9919
In vitro transcription assays showed that Tax was able to significantly increase the transcriptional activity of a template containing the -257 to +74 region of the c-sis/PDGF-B promoter .
 ( protein: c-sis/PDGF-B, None) , ( protein: Tax, None) , ( DNA: -257 to +74 region, None) , ( DNA: c-sis/PDGF-B promoter, 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: c-sis/PDGF-B, None) , ( protein: Tax, None) , ( DNA: -257 to +74 region, None) , ( DNA: c-sis/PDGF-B promoter, None) 