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A 2-bp mutation within the CBF site resulted in a 2-3-fold decrease in the activities of both a 69-bp proximal promoter fragment and a 627-bp full-length promoter fragment .
 627-bp full-length promoter fragment, 69-bp proximal promoter fragment, CBF, 2-bp mutation
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:
 627-bp full-length promoter fragment, 69-bp proximal promoter fragment, CBF, 2-bp mutation