2551
In the present report, high-resolution mapping of this site with DNase I and micrococcal nuclease identified a nucleosome-free region centered around nucleotides (nt) 4490 to 4766 .
 ( DNA: nucleotides (nt) 4490 to 4766, None) , ( protein: DNase I, None) , ( DNA: nucleosome-free region, None) , ( protein: micrococcal nuclease, 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: nucleotides (nt) 4490 to 4766, None) , ( protein: DNase I, None) , ( DNA: nucleosome-free region, None) , ( protein: micrococcal nuclease, None) 