title: Tandem mass spectrometry for the direct assay of lysosomal enzymes in dried blood spots: application to screening newborns for mucopolysaccharidosis IVA.
authors.affiliation: Department of Chemistry, University of Washington, Seattle, WA 98195, USA.
authors.forename: Tanvir
authors.initials: T
authors.lastname: Khaliq
authors.forename: Martin
authors.initials: M
authors.lastname: Sadilek
authors.forename: C Ronald
authors.initials: CR
authors.lastname: Scott
authors.forename: Frantisek
authors.initials: F
authors.lastname: Turecek
authors.forename: Michael H
authors.initials: MH
authors.lastname: Gelb
mesh_terms: D001800:Blood Specimen Collection; D002811:Chondroitinsulfatases / Q000097:blood*; D006801:Humans; D007231:Infant, Newborn; D008247:Lysosomes / Q000201:enzymology*; D009085:Mucopolysaccharidosis IV / Q000175:diagnosis* / Q000201:enzymology; D015997:Neonatal Screening / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization; D013379:Substrate Specificity; D053719:Tandem Mass Spectrometry; D014468:Umbelliferones
chemical_list: D014468:Umbelliferones; D002811:Chondroitinsulfatases; C102295:GALNS protein, human