G6PD and diabetes mellitus: They performed GWASs for HbA1c in people without diabetes (all forms) from multiple ethnic groups and identified a common missense variant, rs1050828 (G202A, p.Val68Met), which contributes with minor allele (T) at nearby rs1050829 to the A− haplotype of Glucose-6-phosphate dehydrogenase, G6PD [4], to be associated with lower HbA1c.