1185
At least two distinct domains of the receptor mediated interaction with hsp90 : the ligand-binding domain located within the PAS region and, surprisingly, the bHLH domain .
 bHLH domain, PAS region, ligand-binding domain, hsp90
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:
 bHLH domain, PAS region, ligand-binding domain, hsp90