. _:vb50941805 . . _:vb50941805 . "vitamin D-dependent rickets type 1A"@en . . _:vb50941805 . "OMIM:264700"^^ . _:vb50941805 . _:vb50941805 . "DOID:0080886"^^ . "A vitamin D-dependent rickets that is characterized by abnormally low levels of calcitriol and that has_material_basis_in mutation in the gene encoding 25-hydroxyvitamin D3-1-alpha-hydroxylase (CYP27B1) on chromosome 12q13."^^ . "ORDO:289157"^^ . "disease_ontology"^^ . .