11172
However, a unique DNA-protein complex was detected when the promoter central 21 bp repeat was reacted with nuclear extracts derived from either the U-373 MG glioblastoma cell line or the THP-1 mature monocytic cell line .
 ( DNA: 21 bp repeat, None) , ( protein: DNA-protein complex, None) , ( cell line: THP-1 mature monocytic cell line, None) , ( cell line: U-373 MG glioblastoma cell line, 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) , ( protein: DNA-protein complex, None) , ( cell line: THP-1 mature monocytic cell line, None) , ( cell line: U-373 MG glioblastoma cell line, None) 