4254
In this study the genetic control of major histocompatibility complex (MHC) class II gene expression during the transition from B cell to plasma cell has been analyzed.
 ( cell type: plasma cell, None) , ( DNA: major histocompatibility complex (MHC) class II gene, None) , ( cell type: B 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:
 ( cell type: plasma cell, None) , ( DNA: major histocompatibility complex (MHC) class II gene, None) , ( cell type: B cell, None) 