5219
CIITA and Bob1 interact with proteins that bind to conserved upstream sequences in promoters of class II major histocompatibility genes and octamer-binding transcription factors Oct-1 and Oct-2 , respectively.
 ( DNA: promoters, None) , ( DNA: conserved upstream sequences, None) , ( protein: Oct-2, None) , ( protein: Oct-1, None) , ( protein: Bob1, None) , ( protein: octamer-binding transcription factors, None) , ( protein: CIITA, None) , ( DNA: class II major histocompatibility genes, 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: promoters, None) , ( DNA: conserved upstream sequences, None) , ( protein: Oct-2, None) , ( protein: Oct-1, None) , ( protein: Bob1, None) , ( protein: octamer-binding transcription factors, None) , ( protein: CIITA, None) , ( DNA: class II major histocompatibility genes, None) 