The observation group consisted of patients with type 2 diabetes [n = 24; mean age, (62.63 ± 9.39) years; the course of type 2 diabetes, (3–84) months; 3 patients were treated with insulin injection; 21 patients were treated with oral drugs; fasting blood glucose was controlled within the normal range in all patients, and the glycated hemoglobin level in all patients was less than 7% (HbA1c < 7%)]. The gene discussed is INS; the disease is type 2 diabetes mellitus.