12546
Immunofluorescence studies on thymic populations of mice carrying transgenes in various combinations of these regulatory DNA elements revealed that thymocytes control the CD4 gene in a different manner than mature peripheral T lymphocytes .
 ( cell type: thymic populations, None) , ( cell type: thymocytes, None) , ( cell type: peripheral T lymphocytes, None) , ( DNA: CD4 gene, None) , ( DNA: regulatory DNA elements, 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: thymic populations, None) , ( cell type: thymocytes, None) , ( cell type: peripheral T lymphocytes, None) , ( DNA: CD4 gene, None) , ( DNA: regulatory DNA elements, None) 