11171
ATF/CREB and Sp family members interacted with the 21 bp repeats to form DNA-protein complexes common to all cell types examined.
 ATF/CREB, DNA-protein complexes, 21 bp repeats, Sp family members
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:
 ATF/CREB, DNA-protein complexes, 21 bp repeats, Sp family members