14536
The decreased expression of immunoglobulin genes indicates that the ras oncogene blocks terminal differentiation to plasma cells , possibly by inhibiting the activity of lymphocyte-specific transcription factors .
 ( DNA: immunoglobulin genes, None) , ( cell type: plasma cells, None) , ( protein: lymphocyte-specific transcription factors, None) , ( DNA: ras oncogene, 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:
 ( DNA: immunoglobulin genes, None) , ( cell type: plasma cells, None) , ( protein: lymphocyte-specific transcription factors, None) , ( DNA: ras oncogene, None) 