11482
This report indicates that the emergence of CTLs against immunorecessive epitopes following multiple administrations of Ad vectors lacking immunodominant antigens is dependent on haplotype and could present an obstacle to gene therapy in an MHC -diverse human population .
 ( protein: MHC, None) , ( protein: immunorecessive epitopes, None) , ( cell type: CTLs, 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: MHC, None) , ( protein: immunorecessive epitopes, None) , ( cell type: CTLs, None) 