10755
CIITA is a positive regulator of class II major histocompatibility complex gene transcription that has been found to be defective in one of the five complementation groups of class II major histocompatibility complex -negative cell lines .
 ( cell line: class II major histocompatibility complex -negative cell lines, None) , ( protein: CIITA, None) , ( protein: class II major histocompatibility complex, None) , ( DNA: class II major histocompatibility complex 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:
 ( cell line: class II major histocompatibility complex -negative cell lines, None) , ( protein: CIITA, None) , ( protein: class II major histocompatibility complex, None) , ( DNA: class II major histocompatibility complex gene, None) 