SLC2A2 and type 2 diabetes mellitus: Aberrant N-glycosylation has been related to gestational, type 1, and type 2 diabetes (Rudman et al., 2019), inactive N-acetylglucosaminyl transferase-IVa causes aberrant N-glycosylation and leads to impaired expression of GLUT2 glycosylation and glucose sensor function of beta cells, and, consequently, evokes type 2 diabetes in high fat diet mice (Ohtsubo et al., 2013; Ohtsubo, 2010).