1297
p50.c-rel heterodimers were also detected bound to this sequence at early time points (7-16 h; early), and both remained active at later time points (40 h; late) after activation.
 ( protein: p50.c-rel heterodimers, 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: p50.c-rel heterodimers, None) 