3696
Moreover, alteration of any one of these features (e.g., cis-element , trans-factor , or cell-specific background ) switched c-Jun to a transcriptional activator of the rPRL promoter .
 c-Jun, rPRL promoter, cis-element, transcriptional activator, trans-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:
 c-Jun, rPRL promoter, cis-element, transcriptional activator, trans-factor