HLA-DQB1 (Human Leukocyte Antigen DQ Beta 1): HLA-DQB1 is a part of the MHC class II molecules, crucial for presenting exogenous peptide antigens to CD4+ T helper cells. It plays a significant role in initiating immune responses against pathogens and in self-tolerance. Variations in HLA-DQB1 are associated with several autoimmune conditions, including type 1 diabetes and celiac disease. Its critical function in immune response modulation makes it a focal point for understanding autoimmune pathogenesis and developing targeted therapies....