960
Terminal differentiation of B cells to plasma cells in vivo is characterized by secretion of Ig and extinction of MHC class II expression on the cell surface.
 ( protein: MHC class II, None) , ( cell type: B cells, None) , ( cell type: plasma cells, None) , ( protein: Ig, 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: MHC class II, None) , ( cell type: B cells, None) , ( cell type: plasma cells, None) , ( protein: Ig, None) 