2887
This effect required surface expression of the CD45 PTPase and was not observed in CD45-deficient variants of Jurkat cells .
 ( cell line: CD45-deficient variants, None) , ( protein: CD45 PTPase, None) , ( cell line: Jurkat 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: CD45-deficient variants, None) , ( protein: CD45 PTPase, None) , ( cell line: Jurkat cells, None) 