7764
Reporter luciferase gene vectors containing the human gamma 3 ECS were used to transfect CL-01 cells , which have been shown to undergo Smu-->S gamma 3 DNA recombination , upon engagement of CD40 by CD40 ligand ( CD40L ) and exposure to IL-4 .
 ( protein: CD40, None) , ( DNA: human gamma 3 ECS, None) , ( protein: CD40 ligand, None) , ( protein: CD40L, None) , ( DNA: Reporter luciferase gene vectors, None) , ( protein: IL-4, None) , ( cell line: CL-01 cells, None) , ( DNA: ECS, 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:
 ( protein: CD40, None) , ( DNA: human gamma 3 ECS, None) , ( protein: CD40 ligand, None) , ( protein: CD40L, None) , ( DNA: Reporter luciferase gene vectors, None) , ( protein: IL-4, None) , ( cell line: CL-01 cells, None) , ( DNA: ECS, None) 