788
Expression of LMP1 was seen in variable proportions of tumor cells in two cases and EBNA2 was detected in some tumor cells in three other cases.
 ( cell type: tumor cells, None) , ( protein: LMP1, None) , ( cell type: tumor cells, None) , ( protein: EBNA2, 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: tumor cells, None) , ( protein: LMP1, None) , ( cell type: tumor cells, None) , ( protein: EBNA2, None) 