14631
Potential phosphorylation sites include the sequence PSPTSPT , which resembles an RNA polymerase II repeat reported to be a target of the cell cycle control kinase cdc2 .
 ( protein: RNA polymerase II repeat, None) , ( protein: cell cycle control kinase cdc2, None) , ( protein: PSPTSPT, None) , ( protein: phosphorylation sites, 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: RNA polymerase II repeat, None) , ( protein: cell cycle control kinase cdc2, None) , ( protein: PSPTSPT, None) , ( protein: phosphorylation sites, None) 