6304
Tumor cell lines with a defective retinoblastoma gene are unable to transcribe the HLA class II genes in response to IFN-gamma treatment , and reconstitution of functional Rb rescues IFN-gamma-induced class II gene expression .
 ( DNA: retinoblastoma gene, None) , ( DNA: class II gene, None) , ( protein: Rb, None) , ( DNA: HLA class II genes, None) , ( protein: IFN-gamma, 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: retinoblastoma gene, None) , ( DNA: class II gene, None) , ( protein: Rb, None) , ( DNA: HLA class II genes, None) , ( protein: IFN-gamma, None) 