4006
In this study, we examined the functional role of cysteine and arginine residues in the ligand-binding domain of hRAR alpha ( hRAR alpha-LBD , amino acids 154 to 462 ).
 ( protein: hRAR alpha-LBD, None) , ( protein: hRAR alpha, None) , ( protein: ligand-binding domain, None) , ( protein: amino acids 154 to 462, 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: hRAR alpha-LBD, None) , ( protein: hRAR alpha, None) , ( protein: ligand-binding domain, None) , ( protein: amino acids 154 to 462, None) 