13461
Despite this effect, steady state levels of HLA-DRalpha , HLA-DRbeta , and invariant (Ii) chains were equivalent in control and infected cells .
 ( protein: HLA-DRbeta, None) , ( protein: HLA-DRalpha, None) , ( protein: invariant (Ii) chains, 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: HLA-DRbeta, None) , ( protein: HLA-DRalpha, None) , ( protein: invariant (Ii) chains, None) 