14375
Regulation of E2F involves its interactions with other cellular proteins , including the retinoblastoma protein ( Rb ), the Rb-related protein p107 , cyclin A , and cdk2 .
 ( protein: cellular proteins, None) , ( protein: E2F, None) , ( protein: Rb-related protein, None) , ( protein: p107, None) , ( protein: cyclin A, None) , ( protein: Rb, None) , ( protein: cdk2, None) , ( protein: retinoblastoma protein, 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: cellular proteins, None) , ( protein: E2F, None) , ( protein: Rb-related protein, None) , ( protein: p107, None) , ( protein: cyclin A, None) , ( protein: Rb, None) , ( protein: cdk2, None) , ( protein: retinoblastoma protein, None) 