11048
Our findings suggest that distinct regulatory elements , acting somewhat independently of each other, control expression of collagenase-1 .
 regulatory elements, collagenase-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:
 regulatory elements, collagenase-1