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One gene encodes a protein, RFX5 , that is a member of the RFX family of DNA binding proteins .
 RFX5, RFX family of DNA binding proteins
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:
 RFX5, RFX family of DNA binding proteins