1602
Electrophoretic mobility-shift assays ( EMSA ) showed that individual DR units , as well as the 12-bp insert , can bind to nuclear factors of chicken T-cells .
 ( protein: nuclear factors, None) , ( cell type: chicken T-cells, None) , ( DNA: 12-bp insert, None) , ( DNA: individual DR units, 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: nuclear factors, None) , ( cell type: chicken T-cells, None) , ( DNA: 12-bp insert, None) , ( DNA: individual DR units, None) 