6303
We found that the observed rate of GR nuclear import increases significantly at higher GR concentrations , at saturating concentrations of dexamethasone ( 10 ( - 6 ) M ) using GFP - tagged GR , while with untagged GR it is only discernable at sub - saturating ligand concentrations ( 10 ( - 10 ) - 10 ( - 9 ) M ) .
 dexamethasone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 dexamethasone