1313
A novel DNA sequence element termed the J element involved in the regulated expression of class II major histocompatibility complex genes was recently described.
 ( DNA: J element, None) , ( DNA: DNA sequence element, None) , ( DNA: class II major histocompatibility complex genes, 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: J element, None) , ( DNA: DNA sequence element, None) , ( DNA: class II major histocompatibility complex genes, None) 