8770
Functional analyses of DNA fragments containing the TATA element and the identification of a DNase I-hypersensitive chromatin site ( HS 1 ) in close proximity to the TATA box suggest that the identified TATA motif is important for elk-1 transcription in vivo.
 elk-1, TATA element, TATA motif, DNA fragments, TATA box, HS 1, DNase I-hypersensitive chromatin site
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:
 elk-1, TATA element, TATA motif, DNA fragments, TATA box, HS 1, DNase I-hypersensitive chromatin site