No influence of the p27 deficiency was noticed on other serum parameters such as triglycerides, total cholesterol, LDL-cholesterol, HDL-cholesterol, β hydroxybutyrate, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) (Table 1). The gene discussed is CDKN1B; the disease is hyperinsulinemic hypoglycemia, familial, 4.