1815
When we compared the activity of the transfected dPRL promoter in PRL- secreting and nonsecreting lymphoid cells , we found that the 3 kb 5'-flanking region of the dPRL promoter did not contain elements restricting expression to only those lymphocytes that produce PRL but allowed expression of fusion reporter genes irrespective of the status of the endogenous PRL gene .
 ( DNA: dPRL promoter, None) , ( cell type: lymphocytes, None) , ( protein: PRL, None) , ( DNA: 3 kb 5#$%#-flanking region, None) , ( DNA: dPRL promoter, None) , ( DNA: PRL gene, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: dPRL promoter, None) , ( cell type: lymphocytes, None) , ( protein: PRL, None) , ( DNA: 3 kb 5#$%#-flanking region, None) , ( DNA: dPRL promoter, None) , ( DNA: PRL gene, None) 