4255
Class II molecules are not expressed in plasma cells because of an active suppression resulting in the abrogation of class II gene transcription .
 ( protein: Class II molecules, None) , ( cell type: plasma cells, None) , ( DNA: class II gene, 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: Class II molecules, None) , ( cell type: plasma cells, None) , ( DNA: class II gene, None) 