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 ).
 hRAR alpha-LBD, hRAR alpha, ligand-binding domain, amino acids 154 to 462
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 hRAR alpha-LBD, hRAR alpha, ligand-binding domain, amino acids 154 to 462