INS and type 2 diabetes mellitus: The analysis of GO terms for DLK1 (Fig. 7C; Additional file 1: Table S15) hinted that DLK1 might be directly tied to T2DM, and it was found that peptide/peptide hormone/insulin secretion and glucose/fatty acid processes were distinctly enriched; additionally, it was participating in responses to carbohydrates, metabolism of purine-containing compounds, and coagulation-related biological processes.