6776
These results provide compelling links between the efficiency of the 20-epi analogue in inducing VDR /DRIP interactions , transactivation in vitro, and its enhanced ability to induce cellular differentiation .
 VDR
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:
 VDR