3435
Moreover, ZK161422 , but not ZK157202 , showed preference for gene activation from a promoter carrying a VD response element with a palindromic arrangement of two hexameric receptor binding sites spaced by 9 nucleotides ( IP9 ) rather than for activation from a response element formed by a direct repeat spaced by 3 nucleotides ( DR3 ).
 ( DNA: VD response element, None) , ( DNA: hexameric receptor binding sites, None) , ( DNA: palindromic arrangement, None) , ( DNA: response element, None) , ( DNA: promoter, 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: VD response element, None) , ( DNA: hexameric receptor binding sites, None) , ( DNA: palindromic arrangement, None) , ( DNA: response element, None) , ( DNA: promoter, None) 