In<unk> , there is not enough<unk><unk>  for gluconeogenesis to occur correctly. Glycolysis (the breakdown of glucose) will still work, as it does not use this enzyme.
Fructose bisphosphatase deficiency
Malonyl-CoA decarboxylase deficiency
Triosephosphate isomerase deficiency
Pyruvate kinase deficiency
Glutaminase deficiency
Enolase deficiency
Ribose-5-phosphate isomerase deficiency
Aldolase A deficiency