12549
The other studied regulatory element is the minimal CD4 silencer which inhibits CD4 gene expression in peripheral CD8 T lymphocytes .
 ( DNA: CD4 gene, None) , ( DNA: minimal CD4 silencer, None) , ( cell type: peripheral CD8 T lymphocytes, None) , ( DNA: regulatory element, 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: CD4 gene, None) , ( DNA: minimal CD4 silencer, None) , ( cell type: peripheral CD8 T lymphocytes, None) , ( DNA: regulatory element, None) 