11170
Electrophoretic mobility shift ( EMS ) analyses utilizing oligonucleotides homologous to each of the 21 bp repeat elements reacted with nuclear extracts derived from cell lines of lymphocytic , monocytic , neuronal , and glial cell origin have demonstrated differential binding of cellular factors to the three 21 bp repeats (1-4).
 ( DNA: 21 bp repeat, None) , ( cell line: cell lines, None) , ( DNA: 21 bp repeats, None) , ( DNA: 21 bp repeat elements, None) , ( protein: cellular factors, 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: 21 bp repeat, None) , ( cell line: cell lines, None) , ( DNA: 21 bp repeats, None) , ( DNA: 21 bp repeat elements, None) , ( protein: cellular factors, None) 