4473
However, transcriptional activation was only observed from a VitD3 response element-driven reporter construct .
 VitD3 response element-driven reporter construct
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:
 VitD3 response element-driven reporter construct