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Core binding factor ( CBF ), also known as polyomavirus enhancer-binding protein 2 and SL3 enhancer factor 1 , is a mammalian transcription factor that binds to an element termed the core within the enhancers of the murine leukemia virus family of retroviruses .
 enhancers, Core binding factor, SL3 enhancer factor 1, CBF, polyomavirus enhancer-binding protein 2, mammalian transcription factor
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:
 enhancers, Core binding factor, SL3 enhancer factor 1, CBF, polyomavirus enhancer-binding protein 2, mammalian transcription factor