3521
It is remarkable that in B-CLL cells the nuclear appearance and DNA binding of specific transcription factors is dramatically affected whereas other members of the same factor family remained unaltered in these leukemic cells.
 factor family, transcription factors, B-CLL cells
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:
 factor family, transcription factors, B-CLL cells