14075
These experiments are of prime importance considering that CD4 -expressing T lymphocytes represent the major virus reservoir in the peripheral blood of infected individuals .
 ( cell type: T lymphocytes, None) , ( protein: CD4, None) , ( cell type: CD4 -expressing T lymphocytes, 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: T lymphocytes, None) , ( protein: CD4, None) , ( cell type: CD4 -expressing T lymphocytes, None) 