<h4>Aim</h4>We planned this study to identify diabetogenic glutamic acid decarboxylase (GAD65) peptides possibly responsible for human leucocyte antigen (HLA)-DR3/DQ2-mediated activation of GAD65-specific CD4 T cells in type 1 diabetes (T1D).<h4>Methods</h4>Top 30 GAD65 peptides, found to strongly bind in silico with HLA-DR3/DQ2 molecules, were selected and grouped into four pools. Here, GAD2 is linked to type 1 diabetes mellitus.