title: Measurement of polymorphic trinucleotide repeats in the androgen receptor gene by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.
abstract: Trinucleotide repeats are polymorphic in normal individuals. CAG repeats in the X-linked androgen receptor gene were counted by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI/TOF-MS). A region of approximately two hundred base-pairs containing the repeats was amplified by polymerase chain reaction, then measured after a simple purification procedure. The single-charged molecular ion species was detected using 0.1 pmol of DNA sample and the number of repeats was determined from the molecular mass. The results indicated that MALDI/TOF-MS is a high-throughput alternative to polyacrylamide gel electrophoresis for precise determination of polymorphic trinucleotide repeats.
authors.affiliation: Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan. j61638@center.osaka-u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Wada
authors.forename: K
authors.initials: K
authors.lastname: Mitsumori
authors.forename: T
authors.initials: T
authors.lastname: Terachi
authors.forename: O
authors.initials: O
authors.lastname: Ogawa
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000097:blood / Q000737:chemistry*; D006801:Humans; D007962:Leukocytes; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D011944:Receptors, Androgen / Q000235:genetics*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods; D018911:Trinucleotide Repeats
chemical_list: D011944:Receptors, Androgen; D004247:DNA