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In addition, we identified a novel E2F -like sequence in human MCM6 promoter which cooperates with the authentic E2F sites in E2F -dependent regulation .
 human MCM6 promoter, E2F, E2F, E2F, E2F sites, E2F -like sequence
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 MCM6 promoter, E2F, E2F, E2F, E2F sites, E2F -like sequence