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Using this technique we have isolated several differentially expressed sequence tags ( DESTs ) from the mouse thymocyte cell line WEHI 7.2 .
 ( cell line: WEHI 7.2, None) , ( cell line: mouse thymocyte cell line, None) , ( DNA: differentially expressed sequence tags, None) , ( DNA: DESTs, 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: WEHI 7.2, None) , ( cell line: mouse thymocyte cell line, None) , ( DNA: differentially expressed sequence tags, None) , ( DNA: DESTs, None) 