10027
Purified HLA-DM -DO complexes could not promote peptide exchange in vitro.
 HLA-DM, HLA-DM -DO complexes
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-DM, HLA-DM -DO complexes