10027
Purified HLA-DM -DO complexes could not promote peptide exchange in vitro.
 ( protein: HLA-DM, None) , ( protein: HLA-DM -DO complexes, 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-DM, None) , ( protein: HLA-DM -DO complexes, None) 