_:vb50936870 "url:https://ghr.nlm.nih.gov/condition/aspartylglucosaminuria"^^ . _:vb50936870 . _:vb50936870 . _:vb50936870 "A lysosomal storage disease that is characterized by delayed speech at 2-3 years of age, has_material_basis_in mutations in the AGA gene that result in the absence or shortage of the aspartylglucosaminidase enzyme in lysosomes, preventing the normal breakdown of glycoproteins."^^ . _:vb50936870 . _:vb50936870 . _:vb50936870 .