6691
HTLV-1 -transformed T-cell lines expressed higher amounts of STAT1 , STAT3 and STAT5 RNA and proteins than virus-negative T cells .
 ( cell line: HTLV-1 -transformed T-cell lines, None) , ( cell type: virus-negative T cells, 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: HTLV-1 -transformed T-cell lines, None) , ( cell type: virus-negative T cells, None) 