_:vb50939295 . _:vb50939295 "A methylmalonic acidemia characterized by autosomal recessive inheritance, defects in the synthesis of AdoCbl, vitamin B12 therapy responsiveness and that has_material_basis_in homozygous or compound heterozygous mutation in the MMAA gene on chromosome 4q31."^^ . _:vb50939295 . _:vb50939295 . _:vb50939295 . _:vb50939295 . _:vb50939295 "url:https://www.ncbi.nlm.nih.gov/pubmed/5686220"^^ . _:vb50939295 "url:https://www.ncbi.nlm.nih.gov/pubmed/12438653"^^ .