718
Identification of a major positive regulatory element located 5' to the human zeta-globin gene .
 human zeta-globin gene, positive regulatory element
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:
 human zeta-globin gene, positive regulatory element