7723
To determine whether positive autoregulation is a necessary component of glucocorticoid-induced cell death , a wild-type GR gene under the control of a tetracycline -regulated promoter was stably transfected into glucocorticoid-resistant cells lacking endogenous functional receptor.
 ( cell line: glucocorticoid-resistant cells, None) , ( protein: GR, None) , ( DNA: tetracycline -regulated promoter, None) , ( DNA: wild-type GR gene, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: glucocorticoid-resistant cells, None) , ( protein: GR, None) , ( DNA: tetracycline -regulated promoter, None) , ( DNA: wild-type GR gene, None) 