6496
To determine whether it is possible to artificially enhance the opening of the chromatin structure of a minimal beta-globin promoter , we placed a 101bp, erythroid-specific DNase 1 hypersensitive site-forming element ( HSFE ) immediately upstream of the beta-globin promoter and gene .
 erythroid-specific DNase 1 hypersensitive site-forming element, minimal beta-globin promoter, HSFE
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:
 erythroid-specific DNase 1 hypersensitive site-forming element, minimal beta-globin promoter, HSFE