6306
We have examined the effect of Rb expression on the activation of the promoter for HLA-DRA , the prototype class II gene .
 ( DNA: prototype class II gene, None) , ( protein: Rb, None) , ( DNA: HLA-DRA, 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: prototype class II gene, None) , ( protein: Rb, None) , ( DNA: HLA-DRA, None) 