88
High levels of UDG expression in a transient transfection assay result in the down-regulation of transcriptional activity through elements specific for E2F -mediated transcription .
 UDG, E2F, elements
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:
 UDG, E2F, elements