1763
Both fragments contain the entire ligand binding domain , and the 35-kDa fragment extended into the hinge region of the receptor.
 ( protein: 35-kDa fragment, None) , ( protein: ligand binding domain, None) , ( protein: hinge region, 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: 35-kDa fragment, None) , ( protein: ligand binding domain, None) , ( protein: hinge region, None) 