11210
Using the yeast two-hybrid system to screen for proteins which interact with Tax1 , we isolated the B subunit of the CCAAT binding protein NF-Y from a HeLa cDNA library .
 ( DNA: HeLa cDNA library, None) , ( protein: NF-Y, None) , ( protein: Tax1, None) , ( protein: CCAAT binding protein, None) , ( protein: B subunit, 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: HeLa cDNA library, None) , ( protein: NF-Y, None) , ( protein: Tax1, None) , ( protein: CCAAT binding protein, None) , ( protein: B subunit, None) 