9915
Transcriptional up-regulation of the c-sis/platelet-derived growth factor-B ( PDGF-B ) proto-oncogene by the Tax protein of human T-cell leukemia virus type 1 has been implicated as one possible mechanism of cellular transformation by human T-cell leukemia virus type 1 .
 ( protein: c-sis/platelet-derived growth factor-B, None) , ( protein: Tax protein, None) , ( protein: PDGF-B, None) , ( DNA: c-sis/platelet-derived growth factor-B ( PDGF-B ) proto-oncogene, 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/platelet-derived growth factor-B, None) , ( protein: Tax protein, None) , ( protein: PDGF-B, None) , ( DNA: c-sis/platelet-derived growth factor-B ( PDGF-B ) proto-oncogene, None) 