In maturity-onset diabetes of the youth (MODY), several studies demonstrated some NEUROD1 candidate mutations, including NEUROD1 p.Pro197His, p.Asp202Glu, p.Leu157Arg, and p.Arg103Pro (Ang et al., 2016; Aǧladioǧlu et al., 2016; Szopa et al., 2016; Horikawa et al., 2018; Demirci et al., 2021). This evidence concerns the gene NEUROD1 and type 2 diabetes mellitus.