11980
Thus, substitutions within the ligand-binding domain of the squirrel monkey glucocorticoid receptor cannot account for the decreased binding affinity of these receptors in squirrel monkey cells .
 glucocorticoid receptor, squirrel monkey cells, ligand-binding domain
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:
 glucocorticoid receptor, squirrel monkey cells, ligand-binding domain