sub:provenance { pmid:7668255dcterms:title "A novel point mutation in a 3' splice site of the NADH-cytochrome b5 reductase gene results in immunologically undetectable enzyme and impaired NADH-dependent ascorbate regeneration in cultured fibroblasts of a patient with type II hereditary methemoglobinemia" . sub:assertionhas-source:pmid:7668255 . }