13524
This region contains binding sites for the cAMP response element-binding protein/activation transcription factor ( CREB/ATF ) and Sp1 families of transcription factors .
 CREB/ATF, Sp1, transcription factors, cAMP response element-binding protein/activation transcription factor
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:
 CREB/ATF, Sp1, transcription factors, cAMP response element-binding protein/activation transcription factor