SLC2A2 and glycogen storage disease due to GLUT2 deficiency: Considering the predicted effects of the mutation and the finding that mutations in SLC2A2 cause a rare recessive disorder with severe growth retardation in humans (Fanconi-Bickel syndrome, FBS, MIM #227810) [19], the frameshift mutation in bovine SLC2A2 is also a very plausible candidate for an increased juvenile mortality.