7778
This suggests other mechanisms for CIITA -induced promoter occupancy , such as an effect on chromatin structure leading to increased accessibility of MHC class II promoters .
 ( cell type: MHC class II, None) , ( DNA: chromatin, None) , ( DNA: MHC class II promoters, None) , ( protein: CIITA, 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:
 ( cell type: MHC class II, None) , ( DNA: chromatin, None) , ( DNA: MHC class II promoters, None) , ( protein: CIITA, None) 