1840
Because this segment presumably folds upon specific DNA binding, its flexibility in solution may reduce the intrinsic DNA affinity of POUHD in the absence of POUs .
 ( protein: POUHD, None) , ( protein: POUs, 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: POUHD, None) , ( protein: POUs, None) 