HLA-DQA1 (Human Leukocyte Antigen DQ Alpha 1 Chain): Part of the MHC class II molecule complex, HLA-DQA1 plays a pivotal role in the immune system by presenting peptide antigens to CD4+ T cells. This process is critical for the activation of the adaptive immune response against pathogens. Variations in the HLA-DQA1 gene are associated with susceptibility to several autoimmune diseases, such as type 1 diabetes and celiac disease, reflecting its importance in immune regulation and disease predisposition....