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pubmed-article:17467719pubmed:dateCreated2007-7-30lld:pubmed
pubmed-article:17467719pubmed:abstractTextTwo-dimensional high-performance liquid chromatography using an electrospray ionization time-of-flight mass spectrometry (2D-HPLC-ESI-TOF-MS) system was established for the on-line determination of asparagine-linked oligosaccharides in glycopeptides. The analysis of the oligosaccharides started with the enzymic transglycosylation reaction utilizing Endo-beta-N-acetylglucosaminidase (Endo-M). The oligosaccharides were transferred to a fluorescent acceptor (NDA-Asn-GlcNAc) with Endo-M to produce the fluorescent oligosaccharides. The resulting fluorescent oligosaccharides were specifically isolated from the non-fluorescent oligosaccharides with fluorescence detection after separation by the 1st dimension Amide-80 column. The fraction of fluorescent oligosaccharides was effectively trapped in the anion exchange column. The trapped oligosaccharides were then separated by the 2nd dimension ODS column and sensitively determined by ESI-TOF-MS. Disialo-Asn (a model oligosaccharide) and several oligosaccharides liberated from ovalbumin could be efficiently separated by the 2D-HPLC and identified from the ESI-TOF-MS. Based on these results, the proposed 2D-HPLC-ESI-TOF-MS system may be useful for on-line oligosaccharide analyses. Although the analytical run time is still long, a high-throughput determination will be performed by optimization of the 2D-HPLC conditions.lld:pubmed
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pubmed-article:17467719pubmed:authorpubmed-author:Toyo'okaToshi...lld:pubmed
pubmed-article:17467719pubmed:authorpubmed-author:FukushimaTake...lld:pubmed
pubmed-article:17467719pubmed:authorpubmed-author:InagakiShinsu...lld:pubmed
pubmed-article:17467719pubmed:authorpubmed-author:MinJun ZheJZlld:pubmed
pubmed-article:17467719pubmed:authorpubmed-author:KuriharaTakam...lld:pubmed
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pubmed-article:17467719pubmed:pagination120-7lld:pubmed
pubmed-article:17467719pubmed:dateRevised2009-1-15lld:pubmed
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pubmed-article:17467719pubmed:year2007lld:pubmed
pubmed-article:17467719pubmed:articleTitleFully automated two-dimensional high-performance liquid chromatography with electrospray ionization time-of-flight mass spectrometry for the determination of oligosaccharides in glycopeptides after enzymic fluorescence labeling.lld:pubmed
pubmed-article:17467719pubmed:affiliationDivision of Bio-Analytical Chemistry, School of Pharmaceutical Sciences, and COE Program in the 21st Century, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.lld:pubmed
pubmed-article:17467719pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:17467719pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed