13784
Full activity can be restored by the combined action of recombinant PC4 and the PC4 -depleted USA fraction , thus suggesting a joint requirement for PC4 and another, USA-derived component (s) for optimal function of Oct-1 /OCA-B in the reconstituted system .
 ( protein: PC4, None) , ( protein: PC4, None) , ( protein: Oct-1, None) , ( protein: PC4, None) , ( protein: /OCA-B, 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: PC4, None) , ( protein: PC4, None) , ( protein: Oct-1, None) , ( protein: PC4, None) , ( protein: /OCA-B, None) 