286
Thus, the block in MHC class II inducibility in RB -defective cells is not due to a block in CIITA inducibility .
 ( protein: RB, None) , ( DNA: CIITA, None) , ( cell line: RB -defective cells, 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:
 ( protein: RB, None) , ( DNA: CIITA, None) , ( cell line: RB -defective cells, None) 