8560
Members of the cyclic adenosine monophosphate ( cAMP ) response element binding (CREB)/activating transcription factor 1 ( ATF-1 ) family of transcription factors bind three 21-bp repeats ( Tax-responsive element-1 , or TRE-1 ) within the viral promoter and are important for basal and Tax-mediated transcription .
 cyclic adenosine monophosphate ( cAMP ) response element, viral promoter, transcription factors, 21-bp repeats, ATF-1, Tax-responsive element-1, cyclic adenosine monophosphate ( cAMP ) response element binding (CREB)/activating transcription factor 1 ( ATF-1 ) family, TRE-1
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:
 cyclic adenosine monophosphate ( cAMP ) response element, viral promoter, transcription factors, 21-bp repeats, ATF-1, Tax-responsive element-1, cyclic adenosine monophosphate ( cAMP ) response element binding (CREB)/activating transcription factor 1 ( ATF-1 ) family, TRE-1