11501
A protein of about 150 kD that bound to this negative regulatory sequence was identified by UV cross-linking .
 ( DNA: negative regulatory sequence, None) , ( protein: 150 kD, 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: negative regulatory sequence, None) , ( protein: 150 kD, None) 