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Erythroid Kruppel-like factor ( EKLF ) is a red cell-specific transcriptional activator that is crucial for consolidating the switch to high levels of adult beta-globin expression during erythroid ontogeny .
 EKLF, Erythroid Kruppel-like factor, red cell-specific transcriptional activator, beta-globin
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:
 EKLF, Erythroid Kruppel-like factor, red cell-specific transcriptional activator, beta-globin