9769
Repertoire selection was monitored by determining the TCR beta chain sequences of RAKFKQLLQ -specific CTL established from primary infected and healthy virus carriers .
 ( protein: TCR beta chain sequences, None) , ( cell line: RAKFKQLLQ -specific CTL, 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: TCR beta chain sequences, None) , ( cell line: RAKFKQLLQ -specific CTL, None) 