1811
Based on sequence homology we identified two binding motifs for Pit-1 and seven half-sites for glucocorticoid receptor/progesterone receptor ( PR ) binding .
 ( protein: PR, None) , ( DNA: binding motifs, None) , ( protein: Pit-1, None) , ( DNA: half-sites, None) , ( protein: glucocorticoid receptor/progesterone receptor, 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:
 ( protein: PR, None) , ( DNA: binding motifs, None) , ( protein: Pit-1, None) , ( DNA: half-sites, None) , ( protein: glucocorticoid receptor/progesterone receptor, None) 