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    J Chromatogr. 1992 Sep 2;579(2):318-23.

    Determination of cystathionine and perhydro-1,4-thiazepine-3,5-dicarboxylic acid in the urine of a patient with cystathioninuria using column liquid chromatography-mass spectrometry.

    Sugahara K, Ohta J, Takemura M, Kodama H.

    Source

    Department of Chemistry, Kochi Medical School, Japan.

    Abstract

    A method for the measurement of cystathionine and perhydro-1,4-thiazepine-3,5-dicarboxylic acid in the urine of a patient with cystathioninuria has been developed, using column liquid chromatography-mass spectrometry. Cystathionine and perhydro-1,4-thiazepine-3,5-dicarboxylic acid were determined by scanning the [M + H]+ ions of each compound. The recoveries were 80-92.4% for cystathionine and 80-100% for perhydro-1,4-thiazepine-3,5-dicarboxylic acid after ion-exchange treatment. The results agreed well with those obtained using an amino acid analyser. The concentrations found for cystathionine and perhydro-1,4-thiazepine-3,5-dicarboxylic acid were 1.289 +/- 0.099 mg/ml and 0.310 +/- 0.0067 mg/ml, respectively.

    PMID:
    1429979
    [PubMed - indexed for MEDLINE]

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