Fig. 1.
a DNA sequencing results confirming the p.Gly223Ser mutation in a healthy family member (top chromatogram) and patient No5109 (bottom chromatogram); b full pedigree of the presented GCK-MODY family. Patient No5109—marked with an arrow—was diagnosed with neonatal diabetes. All patients marked as affected had diabetes or impaired fasting glucose and were heterozygous with the same p.Gly223Ser mutation located in the exon 6 of the GCK. N wild type, M p.Gly223Ser mutation