2367
Androgen binding sites have been identified in circulating human mononuclear leukocytes of healthy donors of both sexes.
 ( cell type: circulating human mononuclear leukocytes, None) , ( protein: Androgen binding sites, 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 type: circulating human mononuclear leukocytes, None) , ( protein: Androgen binding sites, None) 