7076
The human T-cell leukemia virus type 1 ( HTLV-1 ) transcriptional trans-activator Tax has been demonstrated to have transforming activity in multiple cell culture and transgenic-mouse models .
 ( cell line: multiple cell culture, None) , ( protein: human T-cell leukemia virus type 1 ( HTLV-1 ) transcriptional trans-activator, None) , ( protein: Tax, 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 line: multiple cell culture, None) , ( protein: human T-cell leukemia virus type 1 ( HTLV-1 ) transcriptional trans-activator, None) , ( protein: Tax, None) 