Heterozygous mutations in the ABCC8 gene have been well-documented in leucine-sensitive neonatal hypoglycemia (OMIM:240800), transient neonatal diabetes mellitus 2 (OMIM:610374), and non-insulin-dependent diabetes mellitus (OMIM:125853), all exhibiting autosomal-dominant inheritance. The gene discussed is ABCC8; the disease is type 1 diabetes mellitus.