Predicted to enable MHC class II protein complex binding activity. Predicted to be involved in several processes, including antigen processing and presentation of exogenous peptide antigen via MHC class II; negative regulation of antigen processing and presentation of peptide antigen via MHC class II; and peptide antigen assembly with MHC class II protein complex. Predicted to act upstream of or within antigen processing and presentation and regulation of T cell differentiation. Predicted to be integral component of membrane. Predicted to be part of MHC class II protein complex. Human ortholog(s) of this gene implicated in occupational asthma. Orthologous to human HLA-DOA (major histocompatibility complex, class II, DO alpha). [provided by Alliance of Genome Resources, Apr 2022]