2676
We have previously shown that a human B lymphoma cell line, B104 , expressed surface IgM ( sIgM ) and surface IgD ( sIgD ), and that crosslinking of sIgM and sIgD by anti- IgM antibody (Ab) and anti- IgD Ab , respectively, induced Ca2+ influx to almost the same degree, whereas only sIgM -crosslinking caused B104 cell death .
 ( protein: sIgM, None) , ( protein: sIgM, None) , ( protein: IgM, None) , ( cell line: human B lymphoma cell line, B104, None) , ( protein: IgD, None) , ( protein: IgM, None) , ( protein: surface IgM, None) , ( protein: IgD, None) , ( protein: surface IgD, None) , ( protein: sIgD, None) , ( protein: anti- IgM antibody (Ab), None) , ( protein: anti- IgD Ab, None) , ( protein: sIgM, None) , ( protein: sIgD, None) , ( cell line: B104 cell, 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: sIgM, None) , ( protein: sIgM, None) , ( protein: IgM, None) , ( cell line: human B lymphoma cell line, B104, None) , ( protein: IgD, None) , ( protein: IgM, None) , ( protein: surface IgM, None) , ( protein: IgD, None) , ( protein: surface IgD, None) , ( protein: sIgD, None) , ( protein: anti- IgM antibody (Ab), None) , ( protein: anti- IgD Ab, None) , ( protein: sIgM, None) , ( protein: sIgD, None) , ( cell line: B104 cell, None) 