8767
Potential role of a downstream intronic sequence for elk-1 gene expression in monocytes .
 monocytes, elk-1, downstream intronic sequence, elk-1 gene
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:
 monocytes, elk-1, downstream intronic sequence, elk-1 gene