14317
The emergence of nuclear binding proteins was investigated using interleukin-2 sequence specific oligonucleotide probes in the electrophoretic mobility shift assay .
 ( protein: interleukin-2, None) , ( DNA: interleukin-2 sequence specific oligonucleotide probes, None) , ( protein: nuclear binding proteins, 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: interleukin-2, None) , ( DNA: interleukin-2 sequence specific oligonucleotide probes, None) , ( protein: nuclear binding proteins, None) 