14125
The retinoblastoma gene product ( Rb ) is a nuclear phosphoprotein that regulates cell cycle progression .
 ( protein: Rb, None) , ( protein: nuclear phosphoprotein, None) , ( protein: retinoblastoma gene product, 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) , ( protein: nuclear phosphoprotein, None) , ( protein: retinoblastoma gene product, None) 