11219
High levels of the DNA-binding activity of E2F in adult T-cell leukemia and human T-cell leukemia virus type I -infected cells : possible enhancement of DNA-binding of E2F by the human T-cell leukemia virus I transactivating protein , Tax .
 E2F, human T-cell leukemia virus type I -infected cells, Tax, E2F, human T-cell leukemia virus I transactivating protein
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:
 E2F, human T-cell leukemia virus type I -infected cells, Tax, E2F, human T-cell leukemia virus I transactivating protein