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When sequences from -417 to -207 5' to the zeta-globin mRNA cap site were deleted, up to 95% of the zeta-globin promoter activity was lost in K562 cells .
 zeta-globin mRNA cap site, K562 cells, zeta-globin promoter, sequences from -417 to -207 5', zeta-globin, zeta-globin mRNA
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:
 zeta-globin mRNA cap site, K562 cells, zeta-globin promoter, sequences from -417 to -207 5', zeta-globin, zeta-globin mRNA