5669
Mutations of this site that destroyed potential ets transcription factor binding sites had reduced transcriptional activity .
 ets transcription factor, ets transcription factor binding sites
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:
 ets transcription factor, ets transcription factor binding sites