9914
The tax protein of human T-cell leukemia virus type 1 mediates the transactivation of the c-sis/platelet-derived growth factor-B promoter through interactions with the zinc finger transcription factors Sp1 and NGFI-A/Egr-1 .
 ( protein: Sp1, None) , ( protein: zinc finger transcription factors, None) , ( protein: tax protein, None) , ( protein: transcription factors, None) , ( DNA: c-sis/platelet-derived growth factor-B promoter, None) , ( protein: NGFI-A/Egr-1, 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: Sp1, None) , ( protein: zinc finger transcription factors, None) , ( protein: tax protein, None) , ( protein: transcription factors, None) , ( DNA: c-sis/platelet-derived growth factor-B promoter, None) , ( protein: NGFI-A/Egr-1, None) 