2982
In previous studies, it was shown that the fusion region of the pml/RAR-alpha protein , expressed by acute promyelocytic leukemia (APL) cells , can be specifically recognized in vitro by donor (D. E.) CD4 T cells in a HLA class II DR11-restricted fashion .
 ( cell line: CD4 T cells, None) , ( protein: HLA class II, None) , ( protein: pml/RAR-alpha protein, None) , ( cell line: acute promyelocytic leukemia (APL) cells, 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 line: CD4 T cells, None) , ( protein: HLA class II, None) , ( protein: pml/RAR-alpha protein, None) , ( cell line: acute promyelocytic leukemia (APL) cells, None) 