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Interferon regulatory factor 2 ( IRF-2 ) is a transcriptional regulatory protein that terminates interferon beta expression initiated by interferon regulatory factor 1 .
 IRF-2, transcriptional regulatory protein, interferon regulatory factor 1, Interferon regulatory factor 2, interferon beta
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:
 IRF-2, transcriptional regulatory protein, interferon regulatory factor 1, Interferon regulatory factor 2, interferon beta