13461
Despite this effect, steady state levels of HLA-DRalpha , HLA-DRbeta , and invariant (Ii) chains were equivalent in control and infected cells .
 HLA-DRbeta, HLA-DRalpha, invariant (Ii) chains
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 HLA-DRbeta, HLA-DRalpha, invariant (Ii) chains