1638
RESULTS: In patients , both total and free plasma cortisol concentrations were higher than in the normal women , as was their urinary free cortisol ; the number of glucocorticoid receptors per cell ( Ro ) and the binding affinity ( Kd ) for dexamethasone were, however, not significantly different ( Ro : 7687 +/- 1750 vs 7347 +/- 1285 sites/cell; Kd : 7.7 +/- 2.4 vs 7.4 +/- 1.7 nM at 24 degrees C).
 protein: glucocorticoid receptors
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: glucocorticoid receptors