5229
Similar results were obtained when mutants of SIVmacMER (a macrophage-competent derivative of SIVmac239 ) were tested in peripheral blood mononuclear cell and CEMx174 cultures .
 ( cell type: peripheral blood mononuclear cell, None) , ( cell line: CEMx174 cultures, 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: peripheral blood mononuclear cell, None) , ( cell line: CEMx174 cultures, None) 