6773
We report that two 20-epi analogues , MC1627 and MC1288 , induced differentiation and transcription of p21 ( Waf1 , Cip1 ), a key VDR target gene involved in growth inhibition, at a concentration 100-fold lower than that of 1,25(OH)2D3 .
 ( DNA: p21, None) , ( DNA: VDR target gene, None) , ( protein: VDR, None) , ( DNA: Cip1, None) , ( DNA: Waf1, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: p21, None) , ( DNA: VDR target gene, None) , ( protein: VDR, None) , ( DNA: Cip1, None) , ( DNA: Waf1, None) 