14862
Tax was transfected into HTLV-I-negative human T-cell lines .
 HTLV-I-negative human T-cell lines, Tax
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 HTLV-I-negative human T-cell lines, Tax