7808
Autoreactive B-cells are eliminated by anti-IgM crosslinking after encountering self-antigens , but precise mechanisms leading to B-cell apoptosis are still not well understood.
 ( cell type: Autoreactive B-cells, None) , ( protein: self-antigens, None) , ( cell type: B-cell, None) , ( protein: anti-IgM, 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: Autoreactive B-cells, None) , ( protein: self-antigens, None) , ( cell type: B-cell, None) , ( protein: anti-IgM, None) 